Question # 1

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

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

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An equivalent amount of heart energy can neither be created nor destroyed

One form of energy can be transferred into an equivalent amount of other kinds of energy

In an adiabatic process, the work done is independent of its path

Continuous production of mechanical work without supplying an equivalent is amount of heat possible

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

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-94 KJ

-231.6 KJ

+21.4 KJ

+70 KJ

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

Most of the reaction which give stable products are

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Exothermic

Endothermic

Isothermal

None of these

The pressure of oxygen inside the bomb calorimeter is.

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100 atm

50 atm

25 atm

20 atm

The optimum temperature for the synthesis of NH3 by Haber's process is.

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200 ^oC

300 ^oC

400 ^oC

500 ^oC

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

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

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

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Henry's law

Hess's law

Joule's principle

Law of conservation of energy

The born Haber cycle is the best application of law.

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Boyle's

Dalton's

Hess's

Graham's

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

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Henry's law

Hess's law

Joule's principle

Law of combustion

Standard enthalpy of combustion of carbon is -394 kJ mol-1 than, which is the standard enthalpy of formation of CO2

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+394 kJ

-394 kJ

0 kJ

+197 kJ

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

Which is not is state function

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Enthalpy

Entropy

Pressure

work

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

Calorie is equivalent to

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0.4184 J

41.84 J

4.184 J

418.4 J

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