First Year Chemistry Chapter 7 Online MCQ Test for 1st Year Chemistry Chapter 7 Thermochemistry Preparation

• 
  A
• 
  B
• 
  C
• 
  D

Which one of the following process is endothermic

• condensation of steam A
• Freezing of water B
• electrolysis of water C
• None of these D

Which is not is state function

• Enthalpy A
• Entropy B
• Pressure C
• work D

At constant volume of a system remains constant and the heat is absorbed by the system, them amount of heat absorbed is called

• Enthaply change of the system A
• Internal energy change of the system B
• Total enthalphy of the system C
• Total internal energy of the system D

What happens to the enthalpy change when the coeffficients of a chemical equation are douubled

• It doubles A
• It becomes half B
• It does not change C
• It cannot be predicted D

Calorie is equivalent to

• 0.4184 J A
• 41.84 J B
• 4.184 J C
• 418.4 J D

If an endothermic reaction is allowed to take place very rapidly in the air, the temperature of the surrounding air

• Remains constant A
• Increase B
• Decrease C
• Increase a bit D

The sum of all kinds of energies of atoms, ions or molecules of a system is known as.

• Kinetic energy A
• Potential energy B
• Internal energy C
• Solar energy D

The net change in a chemical reaction is same whether it takes place directly or indirectly is

• Henry's law A
• Charles's B
• Hess's lass C
• Graham's law D

One of the following statements about Born-Haber cycle is correct. Which is that statement

• Born-Haber cycle is different from Hess's law A
• The energy change in a cyclic process is not zero B
• The lattice energy of the crystalline substances can be calculated easily C
• Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously D

Which substance have delta E = Delta H and no pressure - volume work.

• Liquids only A
• Solids only B
• Gases only C
• Liquids and solids D

The net heat change in a chemical reaction is same whether it is brought about in two or more different ways in one or several steps. It is knnown as

• Henry's law A
• Hess's law B
• Joule's principle C
• Law of combustion D

Most of the reaction which give stable products are

• Exothermic A
• Endothermic B
• Isothermal C
• None of these D

Which process is endothermic and spontaneous

• Neutralization of NaOH with HCl A
• Formation of NH3 from H2 and N2 B
• Formation of H2O from H2 and O2 C
• Evaporation of sea water D

For a given process, the heat change at constant pressure (q_p) and at constant volume (q_v) are related to each other as

• q_p= q_v A
• q_p< q_v B
• q_p> q_v C
• q_p= q_v/2 D

• Heat of reaction A
• Heat of sublimation B
• Heat of neutralization C
• Heat of combustion D

Which of the following value of heat of formation indicates that the product is least stable.

• -94 KJ A
• -231.6 KJ B
• +21.4 KJ C
• +70 KJ D