Question # 1

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

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State function

Degree and joule

Degree and ergs

Calorie and joule

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

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qp= qv

qp<qv

qp>qv

None of these

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

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q_p= q_v

q_p< q_v

q_p> q_v

q_p= q_v/2

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

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Joule Cm^-3degree^-1

Joule deg^-1atm^-1

Joule deg^-1mol^-1

Joule deg^-1kg^-1

Whenever a reaction is endothermic, then it means that

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Heat is transferred from surrounding to the system

Heat is transferred system to the surrounding

Heat content of the product is greater than that of reactants

Heat content of the reactants is greater than the products

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

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Liquids only

Solids only

Gases only

Liquids and solids

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

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Kinetic energy

Potential energy

Internal energy

Solar energy

Which process is endothermic and spontaneous

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Neutralization of NaOH with HCl

Formation of NH3 from H2 and N2

Formation of H2O from H2 and O2

Evaporation of sea water

If an endothermic reaction is allowed to take place very rapidly i the air, the temperature fo the surrounding air.

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Remains constant

Increase

Decrease

Remain unchanged

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

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It doubles

It becomes half

It does not change

It cannot be predicted

Standard enthalpy change when one mole of compound is formed from their elements at standard state is.

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Heat of formation

Standard heat of formation

Heat of combustion

Standard Heat of neutralization

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

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Born-Haber cycle is different from Hess's law

The energy change in a cyclic process is not zero

The lattice energy of the crystalline substances can be calculated easily

Heat of formation of the product and the lattice energy of the substance can be calculated simultaneously

Spontaneous processes are mostly

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Reversible

Irreversible

Not irreversible

None of these

Which is not is state function

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Enthalpy

Entropy

Pressure

work

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

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Enthaply change of the system

Internal energy change of the system

Total enthalphy of the system

Total internal energy of the system

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In endothermic reactions, the heat content of the.

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Products is more than that of reactants.

Reactants is more than that of products

Both a and b

Reactants and products are equal

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