Question # 1

If internal energy of the system is increased

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Change in state of the system may occur

Temperature of the system may rise

Chemical reaction may take place

All of these

Choose from the followings the correct statement about Born Haber cycle

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Born Haber cycle is different from Hess's law

The energy changes in a cyclic process is not zero

The lattice energy of crystalline substances can be calculated easily

None

The change in enthalpy when one mole of a substance is dissolved in a specified quantity of solvent at a given temperature is called

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Heat of reaction

Heat of solvation

Heat of combustion

Heat of solvent

The change in enthalpy of a system when one mole of the substance is completely burnt in excess of air or oxygen is called

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Heat of reaction

Heat of formation

Heat of atomization

Heat of combustion

A system absorbs 100 kJ heat and performs 50 kJ work on the surroundings. The increase in internal energy of the system is

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50kJ

100 kJ

150kJ

5000 kJ

Which of the following has positive value of enthalpy

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Neutralisation

Atomization

combustion

All of the above

Enthalpy of a reaction can be measured by

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Glass calorimeter

Barometer

Manometer

Thermometer

The enthalpies of all elements in their standard states are

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Unity

always +ve

always -ve

zero

Neutralization of acid-base is

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Spontaneous

Exothermic

Non spontaneous

Both "a" and "c

By convention, the standard heat of formation of all elements is assumed to be

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Zero

positive

Negative

Infinity

If a reaction involves only solids and liquids, which of the following is true?

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ΔH = ΔE

ΔΗ =ΔΕ

ΔH>ΔΕ

AH =AE +nRT

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MDCAT Chemistry Chapter 7 Reaction Kinetics Online Test MCQs With Answers

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