Discuss SCRA Paper and Solution and interview details here.
Aryan Classes page providing information regarding civil services and other graduate level exams.
Aryan Classes page providing information regarding civil services and other graduate level exams.
what will be he expected cut off ??
ReplyDeleteGETTING AROUND 290, OBC CATEGORY , WHAT ARE MY CHANCES?
Deleteobc - 290 - interview call expected.
DeleteBest chances
DeleteDon't know but the paper was easy. Anyways expecting around 350.I think I have a good chance to qualify for the interview.
ReplyDeletewhere did u check ur anwers?
Deletemaths was not easy.....cut off may be not very high
ReplyDeleteOk but it was not that much hard. A normal jee mains paper level
Deletei think maths was easier than GAT
DeleteJEE Mains gives 2 min per question (plus chem questions require less time and hence extra time for maths) vs 1:12 min in SCRA. Considering this the paper was challenging.
Deleteare answer keys and solutions available anywhere??
ReplyDeletehai guys i want to know that the cutoff will be for each paper or for or total marks(out of 600).
ReplyDeletenext think if anybody outline of cutoff or link for answer key please mail me
hii, frnds if score between 325 to 350 ...get sured abt the interview
ReplyDeletehow do you know??
Deletehow much score are you guys expecting???
ReplyDeletescoring about 380-410 in scra 2014 what is the chance to qualify for the interview
ReplyDeleteoh!!! shut up!!!! getting 380-410 and worried about selection??!!?
DeleteCan anyone give some idea about the expected cut-off for gen, sc, st, obc?
ReplyDeletescoring 380-410 marks can i prepare for interview
ReplyDelete@devashish pandey are u telling these marks after taking in account the negative marking, or these are the total marks u attempted for out of 600??
Delete@devashish pande if u are scoring these marks then u might be in top 10 or 20.....i think u are kidding....from where have u checked ur answers????
Deletebetter u ask ur teacher who tell ur score and answers
Delete@devashish pandey
Deletein 2011 the cutoff was around 37% (the topper scored 55%) but there has been a hike from 2012 onwards. Last year cutoff was >300 (all figures are approx as UPSC never releases any data)
This comment has been removed by a blog administrator.
Deletemere 601 aa rahe hai
Delete@devashish pandey are u telling these marks after taking in account the negative marking, or these are the total marks u attempted for out of 600??
ReplyDeleteno i got my answers checked from my teachers and checked gs from the internet and then i am scoring this much marks but i don't know much about scra that's why i am asking
DeleteGetting 382 this time. Missed last year.
Delete@Devashish Pande - I'm envious of you yaar
Tell me you are joking.
is their criteria for individual exam cut off ie cut of for paper1 would be separate
Deleteexpecting 360+ it could be more than 380 also im just thinking minimal...........
ReplyDeletewill i clear it
where did u check ur anwers?
DeletePHSICALSCIENCE 130 MATHS 140+ SOLVED MYSELF CORRECTLY NOT SUR ABT ANSWER IN GK AND ENGLISH
Deletetheek hai toh phir answers bata SET D
DeletePHYSICAL SCIENCE--11, 21, 22, 37, 50, 68, 70, 107,
MATHS-- 59, 71, 74, 96, 97
mine set a
DeleteThis comment has been removed by the author.
ReplyDeleteis there any answer key on internet yet
ReplyDeleteyarkisi ko ans key mile to batao vsymbd1234@gmail.com
ReplyDeletePlease can anyone tell me the cutoff marks for scra 2013 for gen, sc, st? Please it will be very helpful
ReplyDeletehii
ReplyDeletei want to know how many people will be selected for interview pls reply
<200
Delete300-350. wat abt u????
Deleteand when will list of selected students name list will be announced officially
ReplyDeletey this website is not giveing any key of scra
ReplyDeleteExpecting around 300...what are the chances for interview?
ReplyDeletewhere did u check ur anwers?
Deleteplease upload the answer keys
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteYar upsc bhi had karti hai... jab paper banaya tha, tab solve to kra hi hoga.... answer paper pe likh ke scan krke, upload krne me kitni der lagti h????
ReplyDeletePatience ko aur kitna test kroge??Ab to upload krdo yr!!! x(
Can anyone tell me that will i be able to clear the exam if i get b\w 220 250(filled with st) marks?
ReplyDeletecan anyone can text answer key link
ReplyDeletescoring around 300 category obc..........
ReplyDeleteself evaluation based marks...
is there any possibility to get a interview call
This comment has been removed by a blog administrator.
ReplyDeletedid any one ask u the question paper we want key
ReplyDeletei think aryan clas itself is not able to solve qs thats why....
ReplyDeletehalf key for set c is uploaded
ReplyDeletehttp://www.aryanclasses.com/SCRA/scra-2014/SCRA-Special-Class-Railway-Apprentice-answer-key-paper1.html
ReplyDeletemany wrong answers... im getting 67 in english...
ReplyDeleteyup, some answers seem wrong....
Deletehow much are u getting?
Deletewhich one? be specific!
Deleteanyan classes paper
Deletequestion---18,27,31,7,12,14..
by the way how much are u getting??
24 is wrong as well but 31 is correct.. see oxford dictionary...
Deletewhat to see in dictionary??
Deletehow much are u getting aman in english part from aryan's key??
Deleteim getting 67... man does not live by bread alone.. it should have been "on bread". we don't discuss about the case in his presence.. it should have been "discuss the case" . These things are mentioned in oxford dictionary...
Deleteno prob wid 7,12,14..!! dont noe abt 18 and 27..!!
Deleteaman bro go and type in google "man doesn't live by bread alone" ,u will get to know that its correct
Deletewhen will be the result published?
ReplyDeletemarch
DeleteCan anybody tell each question carries how much marks??
ReplyDelete200/120 = 5/3
Deletenegative marking is 1/3rd, ie 5/9.
in gat for correct 1.66666.., and for wrong -0.555555..
ReplyDeletei am getting 80/100 in ENGLISH part after checking the key from aryan classes. yet some question seem to be incorrectly answered
ReplyDelete@harshvardha: i didn't find any mistake? Which ques r wrong?
ReplyDelete@aryan classes: when will u upload other answer?
can any1 give link to resonnce answer key?
again....many wrong answers in gk as well...
ReplyDeletegk ki key kaha se milai
DeleteAre the answers remmoved?
ReplyDeleteyippee.. aryan classes have released paper 1 key..!!
Deletelink: http://www.aryanclasses.com/SCRA/scra-2014/
den click scra paper 1 key.. to download..!! (1.1 mb pdf file)
Blank page is coming!till yesterday answers for English were there but now they are. Not
ReplyDeletearyan classes failed to solve the scra paper 2014 then .............how they prepare studen for scra ?????? pleaze uplod keys
ReplyDeleteyes blank page is apear
ReplyDeletei got 70marks in paper 1st,what is the chances of my selection,i am obc
ReplyDeletePlease someone tell me cutoff for obc!
ReplyDelete@raushan from where you checked the answers
ReplyDeletecan anybody tell the previous year cut off of general category??
ReplyDeletefrom aryan classes and i am expecting total marks 220-230
ReplyDeletenops man
Deleteim expctng around 360 marks any chance for interview call??
ReplyDeletebhaisahab, pehle toh ye batain ki answer pure paper ke check kiye kahan se.
Deleteagar aryan se kiye, toh paperwise breakup kya hai??
i have checked the paper on my personal basis means referring to the book of dc pandey series arihant's other books as all the questions were from those books then after checking the paper's every question i am getting around 355 to 360.
Deletekaun kaun se question dc pandey se aaye, please question number batana main bhi apne answer check kar loon
Deleteyippee.. aryan classes have released paper 1 key..!!
ReplyDeletelink: http://www.aryanclasses.com/SCRA/scra-2014/
den click scra paper 1 key.. to download..!! (1.1 mb pdf file)
heyy agar tere pas key h to muje mail kr de
Deletelakhanmeena001@gmail.com
Can anyone tell me that will i be able to clear the exam if i get b\w 220 250(filled with st) marks?
ReplyDeleteblank paper is coming
ReplyDeleteplz any one upload the question paper its akind request
ReplyDeleteplz tell some one ...........when will the answer key be out?? this is more than enough time for them to publish the answer key
ReplyDeleteAgreed....
DeleteNy1 who gave the exam last year.....after how many days were the answer key released???
yaar ye aryan classes full key kab release karegi aur upsc ka to pta hi nhi lag raha kuch notice nhi diya site pe
ReplyDeleteMere 270 marks aa rahe hai any chances SCRA
ReplyDeleteQualify karne ke liye cut off per paper pe depend hoga ya out of 600??
ReplyDeletekha se total kiya hai..
ReplyDeletegetting around 345 cat obc by using key given by aryans
ReplyDeletearyans ne to math ka solu hi nhi diya hai
ReplyDeletearey maths matched by sample paperand solved by sir
ReplyDeletecan u tell me cut off.
around 230-250
ReplyDeletearyan classes upload all answer key
ReplyDeleteoh thanks buddy
ReplyDeleteis ur 1 attempt
@saurabh ha yar,aryan classes ke key ka link do
ReplyDeleteI think puberty is caused by testosterone nt grwth harmone..!! & ques on solar constant vl hv ans D nt C..!! Wats ur Say guys?
ReplyDeleteagreed with former but not later
ReplyDeleteI am getting 330. Do I have chances of making it to the interview??? Does anyone has any idea about how the interview will be???
ReplyDeleteI m getting 103 marks in paper 1 , do i have chances to qualify for intrview, i m frm obc catgry
ReplyDeletei am getting 115 marks in paper 1 and i am from sc category.
ReplyDeletewhat chances do i have of getting an interview call?
when will aryan classses publish the key of physical sciences and mathematics paper.
ReplyDeletei am really exhausted by opening this website daily in vain.....
they will not give the anser key of math and physics,i talk to him on phone
ReplyDeleteWhat can be expected cutoff for obc this year
ReplyDeletemere 176/600 aa rahe hai / chance mil sakta hai ( obc ) shubham
ReplyDeletearyan classes physical science and maths ke solns kyun ni denge?
ReplyDeleteThis comment has been removed by a blog administrator.
ReplyDelete@raushan I think ques on pubrty vl hv ans B & ques on solar const vl have option D.
ReplyDeleteM gettin 391 gen..!! Crossed checked PCM wid mah frnd and consultd book..!! Wats mah chance? Aryan site says ge written cutoff 360..!! Is it true?
This comment has been removed by the author.
ReplyDeleteit is typical type of examination and we cannot say anything.We should keep calm and wait for result
ReplyDeleteYeah I agree with u!!!! Its better we concentrate on other exams!!
DeleteThis comment has been removed by a blog administrator.
ReplyDeletei m getting 293 any chance of call for interview???????????????
ReplyDeleteshai bola....
ReplyDeletekha se check kiya
ReplyDeletemine getting 350/600 am st is any chance of getting
ReplyDeleteyou are absolulitly cracked for interview
Deletewhere you have checked your answers
from aryan classes from my teachers and from my friends(toppers) when i count once more am getting 325-340
Deletephysical science and maths ka solution kabtak aaye ga
ReplyDeletewriten test ca resalt kab tak aye ga
ReplyDeletePlease send answer key of scra email id is
ReplyDeletedivyanshpandey007.dp@gamil.com
getting 409/600 maths-165;gat-125;physical science-119 ; very easy paper it was.is there any chance of getting a call for interview.... i am general category student.
ReplyDeleteabe answers kaha se check kiye... aur kahi positive marking to nahi ho rahi kya...
ReplyDeleteaur ha they call 40 only and all the 40 people are present here so congracts for the selection for interview
hey getting 378
ReplyDeletecan i get selected
no u can't. cutoff is 379 this year. try next year
DeleteHOW DO U KNOW
DeleteNICE ONE .. :)
ReplyDeletethnx dude
Deletemex.resonance,ac.in
ReplyDeletei think many ans of resonance are wrong
ReplyDeleteThis comment has been removed by a blog administrator.
Deletearyan classes,, i am getting around 385...can i get selected for interview.........
ReplyDelete385 par to tujhe salman khan bhi nahin rok sakta. pakka aayega
DeleteAny answer key? For physical sciences and mathematics paper?
ReplyDeleteI am getting 502/600
ReplyDeleteitni mat chore bade bhai. 502 ? topper banega pakka agar sahi bol raha hei to. wo be record banayega
DeletePHYSICAL SCIENCES PAPER – II
ReplyDelete1. What is the ratio of minimum wavelength of radiation emitted in Balmer series of hydrogen atom to maximum wavelength of the series ?
(a) 5 : 9
(b) 9 : 5
(c ) 1 : 4
(d) 4 : 1
Ans: a
2. An object X of mass m moving forward with velocity v along x-axis collides elastically with a stationary object Y of mass 2 m at the origin. After collision, the object X moves backward along x-axis. Given that the kinetic energy of the system is conserved, the speed of the object Y after collision is
(a) 2v/3
(b) v/3
(c ) v/2
(d) 3v/4
ANs: a
3. There is a linear current I going around a circular wire of radius (a) with centre at origin in the xy-plane. The magnetic field B at (0,0,z) in Cartesian coordinates is given by
(a) B=(μ_0 Ia^2)/(2(z^2+a^2 )^(3/2) )
(b) B=(μ_0 Iza)/(2(z^2+a^2 )^(3/2) )
(c ) B=(μ_0 Iz^2)/(2(z^2+a^2 )^(3/2) )
(d) B=(μ_0 Ia^2)/(2(z^2+a^2 )^(1/2) )
ANs: a
4. There are two long wires each parallel to z-axis, each carrying current I, are at (0 , 0) and the other at (a,b). The force on unit length of each wire is
(a) (μ_0 I^2)/2π(a^2+b^2 )
(b) (μ_0 I^2 (a+b))/2π(a^2+b^2 )
(c ) (μ_0 I^2)/(2π(a^2+b^2 )^(3/2) )
(d) (μ_0 I^2)/(2π(a^2+b^2 )^(1/2) )
Ans: d
5. In a fusion process, effectively 4 protons each of mass m_p each combine to form an alpha particle of mass M, two positrons each of mass m_e, some gamma rays and neutrinos. With c being speed of light, the energy released in the formation of one alpha particle is
(a) (4m_p-M+2m_e ) c^2
(b) (M-4m_p+2m_e ) c^2
(c ) (M-4m_p-2m_e ) c^2
(d) (4m_p-M-2m_e ) c^2
Ans: d
6. A piece of bar magnet of length L having pole strength m is held at an angle θ with a uniform magnetic field of strength H. The piece is then transversely cut into two equal pieces; one of the pieces is held in the same field in similar manner. The ratio of torque of the former to the latter piece of the bar magnet is
(a) 1 : 2
(b) 2 : 1
(c ) 1 : 4
(d) 4 : 1
Ans: b
7. The critical angle of incidence of a ray of light going from a medium A to another medium B is 〖30〗^0. If the velocity of light in the medium A is half the velocity of light in vacuum, then velocity of light in B is
(a) c/4
(b) c
(c ) (√3 c)/2
(d) c/(2√3)
Where c is the speed of light in vacuum.
Ans: b
8. A particle of mass m and charge q is thrown at velocity u in the x-direcion against uniform electric field E in the negative x-direction. The distance it will travel before coming to momentary rest is
(a) (mu^2)/qE
(b) (2mu^2)/qE
(c ) (mu^2)/2qE
(d) (mu^2)/4qE
Ans: c
9. The optical path of a monochromatic light is the same if it passes through 0.665 cm of glass or 0.750 cm of a liquid of refractive index 1.5. The refractive index of glass is
(a) 1.5
(b) 1.7
(c ) 1.2
(d) 1.6
Ans: b
10. The lateral displacement of light passing through a parallel plate of glass of thickness t with angle of incidence 〖60〗^0 and angle of refraction 〖45〗^0 is
(a) (√3-1)t (b)
(√3-1)t/2
(c ) (√3+1)t/2
(d) None of the above
Ans: b
11. A small bar starts sliding down on inclined plane making an angle α with the horizontal. The coefficient of friction μ depends on the distance x as μ=ax where a is a constant. The distance covered by the bar till it stops is
ReplyDelete(a) ((tanα ))/a
(b) 2(tanα )/a
(c ) 2a tanα
(d) tanα/((2a) )
Ans: b
12. Which one of the following waves does not involve oscillations of particles of a medium ?
(a) Waves in a hanging spring
(b) Ripples on a water surface
(c ) A light wave
(d) Ultrasonic waves
Ans: c
13. A certain mass of a given gas of specific heat ratio 1 .5 is compressed such that its volume becomes one –fourth of original volume, first adiabatically and then isothermally. In both the cases the initial state of gas is the same. The ratio of the respective works in each compression respectively is approximately (ln〖2=0.3) 〗
(a) 4
(b) 3
(c ) 2
(d) 1
Ans: b
14. Two plane mirrors form an angle of 〖120〗^0. The distance between the two images of a point source formed in them is 20 cm and the point source lies on the bisector of the angle formed by the mirrors. What would be the least distance of the point source form the line along which the mirrors would touch each other ?
(a) 10 cm
(b) 20/√3 cm
(c ) 10√2 cm
(d) None of the above
Ans: b
15. An astronomical telescope consists of an objective lens that forms at or very near to its principal focus an image of the object which is
(a) real, inverted and reduced
(b) real, inverted and magnified
(c ) virtual, erect and reduced
(d) real, erect and reduced
Ans: A
16. A particle in uniform circular motion can possess
(a) radial acceleration only
(b) tangential acceleration only
(c ) both radial and tangential acceleration
(d) neither radial nor tangential acceleration
Ans: a
17. A particle motion on a apace curve is governed by x=2sin〖t ,y=3 cost 〗 and z=√5 sin〖t.〗 The speed of the particle at any instant is
(a) 3√2 sint
(b) 3 √(cos2t )
(c) 3√(sin2t )
(d) independent of time
Ans: d
18. The frictional force on a rolling cylinder is proportional to
(a) the tangential force and directed perpendicular to the surfaces in contact
(b) the tangential force and directed parallel to the surfaces in contact
(c ) the normal force and directed parallel to the surfaces in contact
(d) the normal force and directed perpendicular to the surfaces in contact
Ans: b
19. The kinetic energy (T) of a particle moving along a circle of radius R depends on the distance covered (s) as T=cs^2 where c is a constant. The force acting on the particle as a function of s is
(a) ks√(1+s/R)
(b) ks√(1+(s/R)^2 )
(c ) ks√(1+(s/R)^3 )
(d) ks√(1+(s/R)^4 )
Where k is a constant.
Ans: b
20. A point mass moves along x-axis according to the law x=A cos^2 (ωt-π/4) . The amplitude of the oscillation is
(a) A
(b) A/2
(c ) 2A
(d) A/3
Ans: b
21. A pendulum consisting of a small sphere of mass m, suspended by an inextensible and massless string of length L is made to swing in a vertical plane. If the breaking strength of the string is 2 mg where g is the acceleration due to gravity, then the maximum angular amplitude of the displacement from the vertical can be
ReplyDelete(a) 〖15〗^0
(b) 〖30〗^0
(c ) 〖60〗^0
(d) 〖75〗^0
Ans: c
For the next 02 (two ) items that follow:
A body of mass m is thrown up with velocity v_0. The air drag is equal to kv^2 where v is the velocity at any instant and k is a positive constant (proportionally constant) .
22. The maximum height to which the body can go is
(a) m/2k (1+(kv_0^2)/mg)
(b) m/k ln〖 (1+(kv_0^2)/mg)〗
(c ) m/2k ln(1+(kv_0^2)/mg)
(d) None of the above
Ans: c
23. What is the velocity with which the body comes down ?
(a) v_0/((1+(kv_0^2)/mg) )
(b) v_0/(1+(kv_0^2)/mg)^(1/2)
(c ) v_0/(1+(kv_0^2)/mg)^(1/3)
(d) None of the above
Ans: b
24. The velocity of a particle moving in the positive direction of x-axis is given by v=α√x where α is a positive constant. The acceleration of the particle will be
(a) α^2
(b) α^2/2
(c ) 2α^2
(d) α^(3/2)
Ans: b
25. a planet moves round the Sun in a circular orbit. The angular velocity of planet will be proportional to
(a) velocity of planet
(b) square of velocity of planet
(c ) cube of velocity of planet
(d) None of the above
Ans: c
26. A wave is represented by y(x,t)=y_m sin〖(kx-ωt-φ).〗 The phase of the wave is
(a) φ
(b) kx-ωt
(c ) ωt+φ
(d) kx-ωt-φ
Ans: d
27. Consider the following statements in respect of a plane progressive wave :
1. All the particles of the medium vibrate in same phase at any instant of time.
2. All the particles of the medium execute simple harmonic motion.
3. The wave velocity depends upon the nature of the medium.
Which of the above statements are correct ?
(a) 1 and 2 only
(b) 2 and 3 only
(c ) 1 and 3 only
(d) 1, 2 and 3
Ans: b
28. Electric charges A and B attract each other. Electric charges B and C also attract each other. But electric charges C and D repel each other. If A and D are held close together then which one of the following is correct ?
(a) They cannot affect each other
(b) They attract each other
(c ) They repel each other
(d) Cannot be predicted due to insufficient data
Ans: c
29. Two small charged spheres contain charges +q and +Q. Some charge is removed from the sphere carrying charge q and is transferred to the other. The charge on each sphere which will result in maximum force between them is
(a) √qQ
(b) ((q+Q))/2
(c ) ((q-Q))/2
(d) None of the above
Ans: b
30. Permanent magnets are those substances that
(a) retain their ferromagnetic property for a long time at room temperature
(b) retain their ferromagnetic property for a long time at all temperatures
(c ) have high permeability and low retentivity at room temperature
(d) high coercivity and low retentivity at room temperature
For the next 03 (three) items at follow:
A non –conducting disc of radius r and uniform positive surface charge density σ is palced on the ground, with its axis vertical. A particle of mass m and charge q is dropped along the axis of the disc from a height h with zero initial velocity. The ratio of charge to mass of the particle is given by q/m=(4∈_0 g)/σ .
Ans: a
31. What is the value of h if the particle just reaches the disc ?
ReplyDelete(a) 4r/3
(b) 2r
(c ) 3r/2
(d) None of the above
Ans: a
32. At what position z (from the ground) will the particle attain equilibrium position ?
(a) z=r/2
(b) z=r/√3
(c ) z=r/√2
(d) None of the above
Ans: b
33. What is the minimum potential energy of the particle ?
(a) mgr
(b) √2 mgr
(c ) √3 mgr
(d) None of the above
Ans; c
For the next 02 (two ) items that follow :
A prism of refractive index n and another prism of refractive index m are stuck together without a gap as shown in the figure. The angles of the prisms are as shown. Refractive indices n and m depend on wavelength λ as follows :
n=1.20 +(10.8×〖10〗^4)/λ^2 and
m=1.45 +(1.80×〖10〗^4)/λ^2
Where λ is in nanometer.
34. What is the wavelength λ_0 for which rays incident at an angle on the interface BC pass through without bending at the interface ?
(a) 500 nm
(b) 600 nm
(c ) 650 nm
(d) None of the above
Ans: b
35. For light of wavelength λ_0 what is the angle of incidence on the face AC such that the deviation produced by the combination of the prisms is minimum ?
(a) 〖30〗^0
(b) 〖45〗^0
(c ) sin^(-1)〖 (3/4)〗
(d) None of the above
Ans: c
For the next 02 (two) items that follow:
A disc of mass m and radius R is connected to springs each with spring constant k as shown in the figure. The disc is rolling on a rough surface.
36. If v is the velocity at any instant, then what is the kinetic energy of disk at that instant ?
(a) (mv^2)/2
(b) (2mv^2)/3
(c ) (3mv^2)/4
(d) None of the above
Ans: c
37. What is the time period of oscillation of disc ?
(a) T=2π √(m/k)
(b) T=2π √(3m/10k)
(c ) T=2π √(7m/10k)
(d) None of the above
Ans: b
For the next 02 (two ) items that follow:
12 wires, each having resistance R are joined to form a skeleton cube as shown in the figure.
38. What is the current through wire BE ?
(a) 0
(b) i/3
(c ) i-i_1
(d) None of the above
Ans: a
39. What is the equivalent resistance between A and C ?
(a) R/6
(b) 2R/3
(c ) 3R/4
(d) None of the above
Ans: c
40. A resistor is in the shape of a truncated right circular cone as shown in the figure. The end radii are a and b, and the length is L. The specific resistance of the material is ρ. What is the resistance of the object ? [Assume that the taper is small, so that the current density is uniform across any cross-section ]
(a) ρL/ab
(b) ρL/πab
(c ) ρL/π(b^2-a^2 )
(d) ρL/2π(b^2-a^2 )
Ans: b
41. A battery of emf 3V and internal resistance 0.2Ω is being charged with a current of 5 A. What is the potential difference between the terminals of the battery ?
ReplyDelete(a) 2V
(b) 3V
(c ) 3.5 V
(d) 4V
Ans: d
42. An equilateral triangle is made of wires each having a resistance of 1 Ω . Any two corners are connected to a cell of emf 2 V. The current drawn from the cell is equal to
(a) 0.66 A
(b) 2 A
(c ) 3 A
(d) 3.5 A
Ans: c
43. A ray of light incident at an angle θ on the first refracting surface of a prism having small angle A gets refracted out normally from the second surface. If n is the refractive index of the material of the prism, then
(a) θ=A/n
(b) θ=nA
(c ) θ=A/((2n) )
(d) θ=(n-1)A
Ans: b
44. Light travels from air to water, from water to glass and then again from glass to air. If x represents refractive index of water with respect to air , y represents refractive index of glass with respect to water and z represents refractive index of air with respect to glass, then which one of the following is correct ?
(a) xy=z
(b) yz=x
(c ) zx=y
(d) xyz=1
Ans: d
45. A fusion reactor when achieved will have which of the following advantages over fission reactor ?
1. Elimination of nuclear waste disposal and nuclear pollution problems
2. Relative ease of procurement of nuclear fuel
Select the correct answer using the code given below :
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans: c
46. A Particle with a positive charge travelling in the x-direction enters a region with a uniform magnetic field □(□(→┬B=Bj))
1. The particle will move in circular path.
2. The kinetic energy of the particle will increase.
3. The particle path will be confined to x= constant plane.
Which of the above statements is/are correct ?
(a) 1 and 3
(b) 2 and 3
(c ) 1 only
(d) 2 only
Ans: c
47. To increase the range of an ammeter of resistance (r)n times, a shunt of resistance (s) is connected in parallel with the ammeter coil. What would be the appropriate value of s ?
(a) nr
(b) r/((n-1) )
(c ) r/n
(d) r/((n+1) )
Ans: b
48. Consider the following statements :
When no current flows through a conductor,
1. the average velocity of free electrons over a large period of time is zero.
2. the average of the velocities of all the free electrons at any instant is zero.
Which of the above statements is/are correct ?
(a) 1 only
(b) 2 only
(c ) Both 1 and 2
(d) Neither 1 nor 2
Ans: c
49. Given that the ground state energy (n=1) of the hydrogen atom is -13.6 eV. The energy difference between n=1 and n=2 states of He^+ is
(a) 13.6 eV
(b) 27.2 eV
(c ) 40.8 eV
(d) 54.4 eV
Ans: c
50. Consider the following statements in respect of stationary waves :
1. The energy flux per unit area is zero.
2. The energy density is same throughout.
Which of the above statements is/are correct ?
(a) 1 only
(b) 2 only
(c ) Both 1 and 2
(d) Neither 1 nor 2
Ans: c
51. On the pole of the earth of radius R, a body is imparted velocity v directly vertically up. The height to which the body will ascend is
ReplyDelete(a) vR/(2gR-v^2 )
(b) (2v^2 R)/(gR-v^2 )
(c ) (v^2 R)/(2gR-v^2 )
(d) (v^2 R)/(gR-v^2 )
Ans: c
52. A block takes n times as much time to slide down a rough incline of 〖45〗^0 as it takes to slide down a perfectly smooth 〖45〗^0 incline. The coefficient of kinetic friction is
(a) 1- 1/n^2
(b) 1/(1-n^2 )
(c ) 1/√(1-n^2 )
(d) √(1-1/n^2 )
Ans: a
53. The earth’s magnetic field varies with
(a) position
(b) time
(c ) both position and time
(d) neither position nor time
Ans: c
54. A particle is projected vertically upward from the surface of earth of radius R with kinetic energy equal to one –third of the minimum value needed for it to escape. The height to which it rises above the surface of earth is
(a) R
(b) R/2
(c ) 2R
(d) R/3
Ans: b
55. A piece of cork float in a vessel filled with kerosene. What part of its volume is submerged in kerosene ?
(a) 1/5
(b) 1/4
(c ) 1/3
(d) 3/4
Ans: b
56. Two particles of masses m and M initially at rest at infinite distance apart approach each other under inverse square law of force given by F=kr^(-2). Their relative speed of approach at the instant when they are at a distance d apart is
(a) √(2k/d (mM/(m+M)) )
(b) √(2k/d ((m+M)/mM) )
(c ) √(k/2d ((m+M)/mM) )
(d) None of the above
Ans: b
57. A pan pizza cools from 91 ^0 C to 79 ^0 C in 2 minutes, on a summer day, when the room temperature is 25 ^0 C. How long will the pan pizza take to cool (from 91 ^0 C to 79 ^0 C), on a winter day, when the room temperature is 5 ^0 C ?
(a) 3/2 minutes
(b) 1 minute
(c ) 1/2 minute
(d) 1/4 minute
Ans: a
58. A proton, a neutron, a β-particle and an α-particle are moving with equal velocity. Which one of the following is correct ?
1. β-particle has greatest de Broglie wavelength
2. α-particle has the smallest de Broglie wavelength
Select the correct answer using the code given below :
(a) 1 only
(b) 2 only
(c ) Both 1 and 2
(d) Neither 1 nor 2
Ans: c
59. Hydrostatic paradox states that the pressure exerted by a liquid
(a) depends on the shape of the containing vessel and independent of height of liquid column
(b) depends on both shape of the containing vessel and height of liquid column
(c ) independent of both shape of the containing vessel and height of liquid column
(d) depends on height only and independent of the shape of the containing vessel
Ans: d
60. A sphere of relative density ρ and diameter D ahs concentric cavity of diameter d. When the sphere just floats on water in tank, then which one of the following is correct ?
(a) D/d=((ρ+1)/ρ)^(1/3)
(b) D/d=((ρ-1)/ρ)^(1/3)
(c ) D/d =(ρ/(ρ-1))^(1/3)
(d) D/d=(ρ/(ρ+1))^(1/3)
Ans: a
61. Oxalic acid, when heated with conc. H_2 SO_4, gives
ReplyDelete(a) H_2 O and CO_2
(b) H_2 O_2 and CO
(c) CO and CO_2
(d) CO_2 and H_2 S
Ans: a
62. Which one of the following is not used as a catalyst in the reaction of SO_2 with O_2 (for the formation of SO_3) ?
(a) V_2 O_5 supported on silica
(b) Platinized asbestos
(c ) Platinum gauze
(d) Charcoal
Ans: d
63. Which one of the following isotopes of fluorine is commonly used for NMR spectroscopy ?
(a) _9^19 F
(b) _9^18 F
(c ) _9^20 F
(d) None of the above
Ans: a
64. Consider the following trends in properties of hydrogen halides:
1. Acidic strength :
HFHCl>HBr>HI
3. Dipole moment :
HFHCl>HBr>HI
The number of correct trends is :
(a) one
(b) Two
(c ) Three
(d) Four
Ans: b
65. The bond order of He_2^+ is
(a) 1
(b) 0
(c) 0.5
(d) 2
Ans: c
66. Liquefaction of helium gives two phases called helium –I and helium –II . Consider the following statements :
1. Helium – I is formed at 4.2 K.
2. Helium – II is formed at 4.2 K .
3. Helium – II is a superconductor.
4. Viscosity of Helium – II is nearly zero.
Which of the above statements are correct ?
(a) 1 and 2 only
(b) 1, 3 and 4 only
(c ) 2, 3 and 4 only
(d) 1, 2, 3 and 4
Ans: c
67. In electrolytic refining of copper, the electrodes used are
(a) Anode is impure copper plate and cathode is pure nickel plate
(b) Anode is pure copper plate and cathode is impure copper plate
(c ) Anode is impure copper plate and cathode is pure graphite plate
(d) Anode is impure copper plate and cathode is pure copper plate
Ans: d
68. The Cl_2 gas prepared by oxidation of HCl with MnO_2 contains impurities of HCl and H_2 O. Chlorine gas is best purified by passing through/over
(a) H_2 O and dry CaO
(b) H_2 O, concentrated H_2 SO_4 and dry CaO
(c ) concentrated H_2 SO_4 and dry CaO
(d) dry CaO only
Ans: d
69. In the extraction of Pb, ore is roasted in air to get PbO which is reduced to elemental Pb under different conditions :
1. Coke 2. CO
3. PbS
Of the above reducing agents the correct ones for this purpose are :
(a) 1 and 2 only
(b) 2 and 3 only
(c ) 1 and 3 only
(d) 1, 2 and 3
Ans: a
70. In the manufacturing of I_2 from the solution of chile salt petre, left after the crystallization of NaNO_3,IO_3^- is generally reduced to I^- with
(a) NaHSO_3
(b) adding finely divided zinc
(c ) passing SO_2
(d) adding SnCl_2
Ans: c
71. What is the hybridization of carbon atom ‘2’ in the following compound ?
ReplyDelete■(1 2 3 4 @CH_2=CH=CH-CH_3 )
(a) sp^3
(b) sp^2
(c ) sp
(d) sp^3 d
Ans: b
72. Consider the following compounds :
Which of the above compounds has/ have phenolic -OH funciton ?
(a) I and III
(b) II and IV
(c ) I and II
(d) II only
Ans: d
73. Consider the following :
Which of the above is/are the correct stereochemical representation of (S)-1- bromoethyl benzene ?
(a) I
(b) II only
(c ) II and IV
(d) II and III
Ans: c
74. Consider the following molecules :
Which of the above are enantimers ?
(a) I and II
(b) I and III
(c ) I and IV
(d) III and IV
Ans: a
75. Consider the following compound :
■( 4 3 2 1@CH_3-CH-CH-CH_3@| |@CH_3 OH)
Which of the carbon atoms in this compound is/are asymmetric ?
(a) C-1 and C_4
(b) C-2 only
(c ) C-3 only
(d) C-2 only C-3
Ans: b
76. If light of energy 5 eV ejects electrons from copper metal with kinetic energy 0.2 eV, what is the approximate wavelength of light that will eject electrons with kinetic energy 1.8 eV ? [Planck’s constant =6.6×〖10〗^(-34) Joule second, charge of electron =1.6×〖10〗^(-19) C]
(a) 200 nm
(b) 400 nm
(c ) 100 nm
(d) 500 nm
Ans: a
77. The longest wavelength present in Balmer series lines is
[Given Rydberg constant =1.097 ×〖10〗^7 m^(-1)]
(a) 640 nm
(b) 656 nm
(c ) 662 nm
(d) 670 nm
Ans: b
78. For the iso-electronic series, which among the following species requires the least energy to remove an outer electron ?
(a) K^+
(b) Ag
(c ) Cl^-
(d) S^(2-)
Ans: b
79. The percentage of ionic character in HCl molecule which has dipole moment of 3.6×〖10〗^(-30) Coulomb metre and bond length of 123 pm, is
(a) 100%
(b) 87%
(c ) 24.2%
(d) 18.3%
Ans: d
80. Consider the following with regard to water molecule :
1. Non –polar covalent
2. Polar covalent
3. σ bond
4. sp^3 hybridization
Which of the above describe the bonding in water molecule ?
(a) 2 and 4 only
(b) 1 and 4
(c) 2 and 3 only
(d) 2, 3 and 4
Ans: d
81. An electric current of 0.965 A is passed for 2000 seconds through a solution containing [Cu(CH_3 CN)_4 ]^+ and metallic copper is deposited at the cathode. The amount of copper deposited is
ReplyDelete(a) 0.005 mol
(b) 0.01 mol
(c ) 0.02 mol
(d) 0.04 mol
Ans: c
82. When sugar C_12 H_22 O_11 is burned to give carbon dioxide CO_2, the increase in oxidation number of carbon atoms is
(a) +4
(b) +2
(c ) +1
(d) 0
Ans: a
83. an ideal gas at initial pressure P_i and volume V_i undergoes reversible expansion to the same volume V_f either isothermally or adiabatically. Consider the following statements :
1. P_f (adiabatic )19,000 years
Ans: d
86. Consider the following equilibria involving SO_2 (g) and their corresponding equilibrium constants :
SO_4 (g)+1/2 O_2 (g)⇌ SO_3 (g) with equilibrium constant K_1
2SO_3 (g)⇌ 2SO_2 (g)+O_2 (g) which equilibrium constant K_2
Which one of the following is correct ?
(a) K_2=K_1^2
(b) K_2^2=K_1
(c ) K_2=K_1
(d) K_2 K_1^2=1
Ans: d
87. When a particular aqueous solution is diluted by a factor of ten with H_2 O, the pH increases by one unit. The solution most likely contains a
(a) Weak acid
(b) Strong base
(c ) Strong acid
(d) Buffer
Ans: c
88. a solution prepared from 1.25 g of oil of wintergreen in 99.0 g of benzene has a boiling point of 〖80.31〗^0 C. What is the molar mass of the compound, given that the normal boiling point of benzene is 80 .〖10〗^0 C and its boiling point elevation constant K_b is 2.53 K kg mol^(-1)?
(a) 137 gm mol^(-1)
(b) 150 gm mol^(-1)
(c ) 560 gm mol^(-1)
(d) 117 gm mol^(-1)
Ans: b
89. By dissolving 68.4 g of a compound whose molecular mass is 342 in 1 kg of water, a solution is prepared. If K_f for water is 1.86 K kg mol^(-1) then freezing point of the solution will be
(a) 272.8 K
(b) 273.5 K
(c ) 282.3 K
(d) 263.7 K
Ans: a
90. For the reaction
2NO(g)+O_2 (g)⇌2NO_2 (g),
The equilibrium concentrations at a certain temperature are found to be [NO]= 0.10 M ,[O_2 ]=0.20 M,[NO_2 ]= 0.30 M. The value of equilibrium constant at this temperature is
(a) 1.5
(b) 15
(c ) 45
(d) 150
Ans: c
91. What is the number of structural isomers for a compound with molecular formula C_5 H_12?
ReplyDelete(a) 2
(b) 3
(c ) 4
(d) 5
Ans: b
92. Which of the following on ozonolysis yields propanal and acetone ?
(a) 2-hexane
(b) 3-hexane
(c ) 2 –methylpent – 2-ene
(d) None of the above
Ans: c
93. Consider the following compounds :
I. CH_3 Br
II. CH_3 CH_2 Br
III. ■(CH_3@|@CH_3-CHBr)
What is the correct order of reactivity of a nucleophile toward the above compounds ?
(a) I<II<III
(b) II <III<I
(c ) III<II<I
(d) III<I<II
Ans: c
94. Consider the following structures :
Which one of the following is correct in respect of above structures ?
(a) Anomers
(b) Epimers
(c ) Enantiomers
(d) Aldopentose
Ans: b
95. Consider the following compounds :
I. Cl_3 CCO_2 H
II. O_2 NCH_2 CO_2 H
III. NCCH_2 CO_2 H
What is the correct order of acidity of the above compounds ?
(a) I<III<II
(b) III<II<I
(c ) II<III<I
(d) III<I<II
Ans: d
96. Consider the following compounds :
Which of the above compounds is/are aromatic ?
(a) I only
(b) I and IV
(c ) I and V
(d) II and III
Ans: c
97. Which of the following conditions can bring about the following transformation ?
(a) conc. H_2 SO_4,〖80〗^0 C
(b) conc. H_2 SO_4,〖160〗^0 C
(c ) dil. H_2 SO_4,〖160〗^0 C
(d) None of the above
Ans: b
98. Which one of the following polysaccharides is soluble in water ?
(a) amylopectin
(b) Amylose
(c ) Cellulose
(d) Glycogen
Ans: a
99. Reactant and product are given in the following reaction :
CH_3=CH=CH_2→CH_3-CH_2-CH_2 OH
Which of the following reagents can one use for this reaction ?
(a) Dilute H_2 SO_4 solution
(b) (H-BH_2 )_2 |H_2 O_2 | NaOH(aq)
(c ) dilute NaOH solution
(d) Grignard reagent
Ans: b
100. Consider the following compounds :
I. ■(CH_3 @| @CH_3-C-H_2 OH@| @CH_3 )
IV. ■(CH_3@|@CH_2=CH-CHOH)
In which of the above compounds -OH group is attached to secondary carbon atom ?
(a) I and II
(b) I, III and IV
(c ) III and IV only
(d) II and III
Ans: c
101. The ortho and para nitorphenols can be separated by
ReplyDelete(a) Steam distillation
(b) Crystallization
(c ) Sublimation
(d) Condensation
Ans: a
102. Consider the following :
I. SH^⊖
II. F^⊖
III. N ̈H_3
IV. ■(⊖@OH )
V. ■(⊖@OR )
What is the correct order of decreasing nucleophilicity in water ?
(a) I>III>II>IV>V
(b) II>V>IV>I>III
(c ) III>I>IV>V>II
(d) III>I>V>IV>II
Ans: d
103. Consider the following with regard to enzymes :
1. Enzymes are biocatalysts.
2. Enzymes are proteins in nature.
Which of the above statements is/are correct ?
(a) 1 only
(b) 2 only
(c ) Both 1 and 2
(d) Neither 1 nor 2
Ans: c
104. In the direct nitration of aniline by using HNO_3 | H_2 SO_4 at 288 K, a mixture of products is formed in which
(a) p-nitoraniline and o-nitroaniline are major products and m-nitroaniline is not formed
(b) p-nitroaniline and m-nitoraniine are major products and o-nitroaniline is minor product
(c ) p-nitoaline and o-nitoraniline are major products and m-nitroaline is minor product
(d) o-nitroaline and m-nitroaniline are major products and p-nitroaniline is minor product
Ans: c
105. Consider the following reaction :
What is the major product in the above reaction ?
Ans: b
106. Beta – carotene is the most important of the A vitamins. Its molar mass can be determined by measuring the osmotic pressure generated by a given mass of beta –carotene. If 10 mL of a solution containing 7.68 mg of beta – carotene, has an osmotic pressure of 3.54 ×〖10〗^(-2) bar at 〖25〗^0 C (R=0.083 dm^3 bar mol^(-1) K^(-1) ), the molar mass of beta –carotene is
(a) 109 g/mol
(b) 54 g/mol
(c ) 537 g/mol
(d) 768 g/mol
Ans: a
107. In the spontaneous beta particle (β^- ) emission, what is the source of the emitted electron ?
(a) the nucleus
(b) the 1s orbital
(c ) the outermost occupied orbital
(d) a random orbital
Ans: a
108. Which one of the following represent acid-base reaction according to Lewis definition, but not according to Bronsted-Lowry definition ?
(a) MgCl_2 (s)⇌Mg^(2+) (aq)+2Cl^- (aq)
(b) CN^-+H_2 O (l)⇌ HCN(aq)+OH^- (aq)
(c ) NH_3 (g)+HBr (g)⇌ NH_4 Br(s)
(d) Fe(H_2 O)_6^(3+) (aq)+H_2 O ⇌ [Fe(H_2 O)_5 OH]^(2+) (aq)+H_3 O^+ (aq)
Ans: c
109. A 0.20 molar solution of a weak monoprotic acid, HA, ahs a pH of 3.0. The ionization constant of the acid is
(a) 5.0 ×〖10〗^(-7)
(b) 2.0×〖10〗^(-7)
(c ) 5.0×〖10〗^(-6)
(d) 5.0 ×〖10〗^(-3)
Ans: c
110. If the radius of 1s electyron orbit of a hydrogen atom is 53 pm, then the radius of the 3p electron orbit would be
(a) 0.477 nm
(b) 477 nm
(c ) 159 pm
(d) 17.66 nm
Ans: a
111. In which one of the following properties of hydrogen, its resemblance with halogens is seen ?
ReplyDelete1. It forms oxides
2. It forms a diatomic molecule
3. Its ionization enthalpy is quite high
4. It forms numerous covalent compounds
Select the correct answer using the code given below :
(a) 2, 3 and 4 only
(b) 1, 2 and 3 only
( c) 1 and 4 only
(d) 1, 2, 3 and 4
Ans: d
112. The radioactivity is highest for which one of the following ?
(a) Ortho hydrogen
(b) Tritium
(c ) Protium
(d) Deuterium
Ans: b
113. Consider the following reactions :
1. T_2+CuO → T_2 O+Cu
2. 2T_2+O_2 ■(□(→┴( Pd ) )@catalyst ) 2T_2 O
3. 2T_2+O_2 □(→┴( sunlight ) ) 2T_2 O
Which of the above give good yield of T_2 O in laboratory conditions ?
(a) 1, 2 and 3
(b) 1 and 2 only
(c ) 2 and 3 only
(d) 1 and 3 only
Ans: b
114. Consider the following compounds :
1. CaCl_2
2. BeCl_2
3. BaCl_2
4. SrCl_2
5. MgCl_2
What is the correct order of melting point for the above compounds ?
(a) 1>2>3>4>5
(b) 3>4>1>5>2
(c ) 2>5>1>4>3
(d) 4>2>5>1>3
Ans: b
115. Which one of the following is used for water softening ?
(a) Ca_3 (PO_4 )_2
(b) Na_3 PO_4
(c ) Na_2 [Na_4 (PO_3 )_6 ]
(d) Na_2 HPO_4
Ans: c
116. Bubbling of CO_2 through lime water results in a turbid solution. This is due to formation of
(a) Ca(HCO_3 )_2
(b) CaCO_3
(c ) Ca(OH)_2
(d) CaO
Ans: b
117. Partial dehydration of gypsum at around 〖150〗^0 C affords mainly
(a) CaSO_4
(b) CaSO_4.2H_2 O
(c ) CaSO_4.1/2 H_2 O
(d) CaSO_4.H_2 O
Ans: c
118. Consider the following statements with regard to magnesium sulphate :
1. It is sparingly soluble in water .
2. Its solubility in water is less than calcium sulphate .
3. When heated to 〖900〗^0 C, to gives magnesium oxide.
Which of the above statements is/are correct ?
(a) 1 and 3
(b) 2 only
(c ) 3 only
(d) 2 and 3
Ans: c
119. The number and type of bonds between two carbon atoms in CaC_2 are
(a) One σ bond and one π bond
(b) One σ bond and two π bonds
(c ) One σ bond only
(d) One σ and one δ bond
Ans: b
120. Among the following allotropic forms of sulphur, which does not contain S_8 rings ?
(a) Monoclinic sulphur
(b) Engel’s sulphur
(c ) Rhombic sulphur
(d) γ-monoclinic sulphur
Ans: b
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