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

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

Most of the reaction which give stable products are

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

Which one of the following enthalpies is always an exothermic process.

• Enthalpy of atomization A
• Enthalpy of neutralization B
• Enthalpy of ionization C
• Enthalpy of dissociation D

In endothermic reactions, the heat content of the

• Products is more then that of reactants A
• Reactants is more than that of products B
• Both a and b C
• Reactant and products is equal D

Calorie is equivalent to

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

The standard heat of formation is measured at 1 atmosphere and

• 0 ^oC A
• 100 ^oC B
• 293 ^oC C
• 25 ^oC 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

The S.I. units for the molar heat capacity are

• Joule Cm^-3degree^-1 A
• Joule deg^-1atm^-1 B
• Joule deg^-1mol^-1 C
• Joule deg^-1kg^-1 D

Born Haber cycle is used to determine the

• Lattice energy A
• Enthalpy of formation B
• Enthalpy of ionization C
• Enthalpy of dissociation D

• 
  A
• 
  B
• 
  C
• 
  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

A material or a collection of materials which is under study is called

• State function A
• Degree and joule B
• Degree and ergs C
• Calorie and joule D

The enthalpy of combustion is

• Positive A
• Negative B
• Either positive or negative C
• No correlation 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 known as

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

The change in heat energy of a chemical reaction at constant temperature and pressure is called

• Enthalpy change A
• Bond energy B
• Heat of sublimation C
• Internal energy change D

In endothermic reactions, the heat content of the.

• Products is more than that of reactants. A
• Reactants is more than that of products B
• Both a and b C
• Reactants and products are equal D

The change in heat energy of a chemical reaction at constant temperature and pressure is called.

• Enthalpy change A
• Bond energy B
• Heat of sublimation C
• Internal energy change D