The previous year Chemistry Question Paper of Joint Entrance Examination (Main) - Paper I is as follows:

An ideal gas undergoes isothermal expansion at constant pressure. During the process:
(1) enthalpy increases but entropy decreases.
(2) enthalpy remains constant but entropy increases.
(3) enthalpy decreases but entropy increases.
(4) Both enthalpy and entropy remain constant.

50 mL of 0.2 M ammonia solution is treated with 25 mL of 0.2 M HCl. If pKb of ammonia solution is 4.75, the pH of the mixture will be :
(1) 3.75
(2) 4.75
(3) 8.25
(4) 9.25

The electron in the hydrogen atom undergoes transition from higher orbitals to orbital of radius 211.6 pm. This transition is associated with :
(1) Lyman series
(2) Balmer series
(3) Paschen series
(4) Brackett series

At 300 K, the density of a certain gaseous molecule at 2 bar is double to that of
dinitrogen (N2) at 4 bar. The molar mass of gaseous molecule is :
(1) 28 g mol−1
(2) 56 g mol−1
(3) 112 g mol−1
(4) 224 g mol−1

What quantity (in mL) of a 45% acid solution of a mono-protic strong acid must be mixed with a 20% solution of the same acid to produce 800 mL of a 29.875% acid solution?
(1) 320
(2) 325
(3) 316
(4) 330


Chemistry Question Paper JEE (Main) - Paper I

Attached Files

Chemistry Question Paper JEE (Main) - Paper I.pdf (338.9 KB, 58 views)