Q 1 :

Which of the following properties will change when system containing solution 1 will become solution 2?                 [2025]

• Molar heat capacity

   

• Density

   

• Concentration

   

• Gibbs free energy

   

Q 2 :

An ideal gas undergoes a cyclic transformation starting from the point A and coming back to the same point by tracing the path A → B → C → D → A as shown in the three cases above.

Choose the correct option regarding $\mathrm{\Delta U}$:                                       [2025]

• $\mathrm{\Delta U} \left(\text{Case-III}\right)>\mathrm{\Delta U} \left(\text{Case-II}\right)>\mathrm{\Delta U} \left(\text{Case-I}\right)$

   

• $\mathrm{\Delta U} \left(\text{Case-I}\right)=\mathrm{\Delta U} \left(\text{Case-II}\right)=\mathrm{\Delta U} \left(\text{Case-III}\right)$

   

• $\mathrm{\Delta U} \left(\text{Case-I}\right)>\mathrm{\Delta U} \left(\text{Case-II}\right)>\mathrm{\Delta U} \left(\text{Case-III}\right)$

   

• $\mathrm{\Delta U} \left(\text{Case-I}\right)>\mathrm{\Delta U} \left(\text{Case-III}\right)>\mathrm{\Delta U} \left(\text{Case-II}\right)$

   

Q 3 :

Given below are two statements:                                                                      [2025]

Statement I: When a system containing ice in equilibrium with water (liquid) is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted.

Statement II: At melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice and kinetic energy of molecules is not increased at melting point.

In the light of the above statements, choose the correct answer from the options given below:

• Statement I is true but Statement II is false.

   

• Both Statement I and Statement II are false.

   

• Both Statement I and Statement II are true.

   

• Statement I is false but Statement II is true.

   

Q 4 :

What happens when methane undergoes combustion in systems A and B respectively?                  [2023]

[IMAGE 11]

• System A	System B
  Temperature remains same	Temperature rises

   

• System A	System B
  Temperature rises	Temperature remains same

   

• System A	System B
  Temperature falls	Temperature rises

   

• System A	System B
  Temperature falls	Temperature remains same

   

Q 5 :

The number of endothermic process/es from the following is _________ .

A.  ${\mathrm{I}}_2\left(\mathrm{g}\right)\to 2\mathrm{I}\left(\mathrm{g}\right)$

B.  $\mathrm{HCl}\left(\mathrm{g}\right)\to \mathrm{H}\left(\mathrm{g}\right)+\mathrm{Cl}\left(\mathrm{g}\right)$

C.  ${\mathrm{H}}_2\mathrm{O}\left(l\right)\to {\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)$

D.  $\mathrm{C}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\to {\mathrm{CO}}_2\left(\mathrm{g}\right)$

E.  Dissolution of ammonium chloride in water                       [2023]

Q 6 :

The total number of intensive properties from the following is ________ Volume, Molar heat capacity, Molarity $E^{\theta }$cell, Gibbs free energy change, Molar mass, Mole            [2023]