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

Spontaneous processes are mostly

• Reversible A
• Irreversible B
• Not irreversible C
• None of these D

Which of the following statement is contrary to the first law of thermodynamics

• An equivalent amount of heart energy can neither be created nor destroyed A
• One form of energy can be transferred into an equivalent amount of other kinds of energy B
• In an adiabatic process, the work done is independent of its path C
• Continuous production of mechanical work without supplying an equivalent is amount of heat possible 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

the value of delta H and delta E for liquids and solids is almost same because.

• No change in temperature A
• Heat absorbed B
• No change in volume C
• Heat evolved D

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

The pressure of oxygen inside the bomb calorimeter is.

• 100 atm A
• 50 atm B
• 25 atm C
• 20 atm 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

For a given process, the heat chagnes of constant pressure and at constant volume are related to each other as.

• qp= qv A
• qp<qv B
• qp>qv C
• None of these 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

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 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

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

Most of the reaction which give stable products are

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

The heat contents of the system of known as.

• Entropy A
• Enthalpy B
• Work C
• Free energy D

A chemical change always involve

• Absorption of heat A
• Evolution of heat B
• Either absorption or evolution of heat C
• The liberation of heat and light energy D

The standard heat of formation is measured at 1 atmosphere and

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