WBJEE Chemistry question paper

Hello sir, I am Lokesh Kumawat. I am from Kolkata. I want you to help me by providing me information regarding the WBJEE Chemistry question paper. Can you provide me with it?

[Raman Vij]

As you have asked about the WBJEE 2015 Chemistry question paper, I am proviidng you with it
For the reaction A + 2B C, the reaction rate is doubled if the concentration of A is doubled. The rate isincreased by four times when concentrations of both A and B are increased by four times. The order of the reactions is
(A) 3 (B) 0 (C) 1 (D) 2
Solution :
(C

At a certain temperature, the value of the slope of the plot of osmotic pressure against concentration (Cin mol L 1) of a certain polymer solution is 291R. The temperature at which osmotic pressure is measured is (R is gas constant)
(A) 271 ∫C (B) 18 ∫C (C) 564 K (D) 18 K
Solution :
(B)
45. The rms velocity of CO gas molecules at 27 ∫C is approximately 1000 m/s. For N2 molecules at 600 K the rms velocity is approximately
(A) 2000 m/s (B) 1414 m/s (C) 1000 m/s (D) 1500 m/s
Solution :
(B)

46.A gas can be liquefied at temperature T and pressure P provided
(A) T = TC and P < Pc
(B) T < T
C
and P > P
C
(C) T > T
C
and P > P
C
(D) T > T
C
and P < P
C
Solution :
(B)
47.
In a mixture, two enantiomers are found to be present in 85% and 15% respectively. The enantiomeric excess (e, e) is
(A) 85% (B) 15% (C) 70% (D) 60%
Solution :
(C)
48. 1,4-dimethylbenzene on heating with anhydrous AlCl3 and HCl produces
(A) 1,2-dimethylbenzene (B) 1,3-dimethylbenzene
(C) 1,2,3-trimethylbenzene (D) Ethylbenzene

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WBJEE 2015 Chemistry Question paper