Chemical Thermodynamics · JEE Main previous year questions

2018 3 questions

1. Q812018 · 16 Apr 2018 · Shift 1

   The gas phase reaction $2\mathrm{N}{\mathrm{O}}_2(\mathrm{g})\to {\mathrm{N}}_2{\mathrm{O}}_4(\mathrm{g})$ is an exothermic reaction. The decomposition of ${\mathrm{N}}_2{\mathrm{O}}_4$, in equilibrium mixture of $\mathrm{N}{\mathrm{O}}_2(\mathrm{g})$ and ${\mathrm{N}}_2{\mathrm{O}}_4(\mathrm{g})$, can be increased by :

   1. A.lowering the temperature.
   2. B.increasing the pressure.
   3. C.addition of an inert gas at constant volume.
   4. D.addition of an inert gas at constant pressure.
   Show answer

   Answer: D

2. Q652018 · 8 Apr 2018 · Shift 1
   
   1. A.A and D
   2. B.A and B
   3. C.B and C
   4. D.C and D
   Show answer

   Answer: B

3. Q662018 · 8 Apr 2018 · Shift 1

   The combustion of benzene(l) gives ${\text{CO}}_2(\text{g})$ and ${\text{H}}_2\text{O}(\text{l})$. Given that heat of combustion of benzene at constant volume is $-3263.9\text{kJ}{\text{mol}}^{-1}$ at $25^{\circ }\text{C}$; heat of combustion (in $\text{kJ}{\text{mol}}^{-1}$) of benzene at constant pressure will be : $(\text{R}=8.314\text{J}{\text{K}}^{-1}{\text{mol}}^{-1})$

   1. A.$-3267.6$
   2. B.4152.6
   3. C.$-452.46$
   4. D.3260
   Show answer

   Answer: A