Here I am giving you question papers for West Bengal Joint Entrance Examination engineering chemistry subject in a PDF file attached with it so you can get it easily.

In diborane, the number of electrons that account for bonding in the bridges is
(A) Six (B) Two (C) Eight (D) Four
Ans : (D)

A van der Waals gas may behave ideally when
(A) The volume is very low
(B) The temperature is very high
(C) The pressure is very low
(D) The temperature, pressure and volume all are very high
Ans : (C)

The half-life for decay of 14C by β-emission is 5730 years. The fraction of 14C decays, in a sample that is 22,920 years
old, would be
(A) 1/8 (B) 1/16 (C) 7/8 (D) 15/16
Ans : (D)

2-Methylpropane on monochlorination under photochemical condition give
(A) 2-Chloro-2-methylpropane as major product
(B) (1:1) Mixture of 1-chloro-2-methylpropane and 2-chloro-2-methylpropane
(C) 1-Chloro-2-methylpropane as a major product
(D) (1:9) Mixture of 1-chloro-2-methylpropane and 2-chloro-2-methylpropane
Ans : (C)

For a chemical reaction at 27°C, the activation energy is 600 R. The ratio of the rate constants at 327°C to that of at
27°C will be
(A) 2 (B) 40 (C) e (D) e2
Ans : (C)

Chlorine gas reacts with red hot calcium oxide to give
(A) Bleaching powder and di hlorine monoxide (B) Bleaching powder and water
(C) Calcium chloride and chlorine dioxide (D) Calcium chloride and oxygen
Ans : (D)

Attached Files

WBJEE Engineering Chemistry Exam Papers.pdf (592.1 KB, 111 views)