Chemistry Chapter 7 Thermochemistry Mcqs Test Online Punjab 11th Class

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Question 1 of 12

Chemistry

1. Heat of ________ of a substance is always negative

Formation

Combustion

Decomposition

Solution

Question 1 of 12

Question 2 of 12

2. For writing a thermochemical equation for enthalpy of combustion of an element requires,
(a) 1 mole of element as reactant
(b) 1 mole of oxide of element as product
(c) Standard states of all the substances
(d) Balanced equation of 1 mole of element

a, c, d

a, b

a

a, b, c, d

Question 2 of 12

Question 3 of 12

3. Boron Haber cycle is used to determine lattice energies of

Metallic solids

Ionic solids

Molecular solids

Covalent solids

Question 3 of 12

Question 4 of 12

4. Total heat content of a system is called

Internal energy

Heat

State Function

Enthalpy

Question 4 of 12

Question 5 of 12

5. Enthalpy of combustion for C is – 393.5 KJmole⁻¹ C(s) + O₂(g) → CO₂(g)  ∆H°_combustion = -393.5 KJmole⁻¹ Enthalpy of formation of CO₂ would be

-393.5 KJ

+393.5 KJ

Cannot be predicted form the given equation

Zero

Question 5 of 12

Question 6 of 12

6. q = ∆H when

∆V = 0

∆E = 0

P = 0

None of these

Question 6 of 12

Question 7 of 12

7. Enthalpy of neutralization of all the strong acids and strong basis has the same value due to:

The complete ionization of acids and bases

The combination of H⁺ and OH ions to form water

The formation of salt and water

The formation of salt

Question 7 of 12

Question 8 of 12

8. Which of the following substances have zero value for their standard enthalpy of formation.

ZnO

H₂O

O₃

None of these

Question 8 of 12

Question 9 of 12

9. Which of the following is not a state function of a system.

Thermal energy at constant pressure

Enthalpy

Work done

Internal energy

Question 9 of 12

Question 10 of 12

10. A bomb calorimeter is used in __________ calorimetric

Constant volume

Constant pressure

Constant temperature

Both a and b

Question 10 of 12

Question 11 of 12

11. A balloon filled with oxygen is placed in a freezer. Identify system:

Oxygen

Balloon

Freezer

All of these

Question 11 of 12

Question 12 of 12

12. Calorie is equivalent to

4.18J

0.418J

4.18KJ

0.418KJ

Question 12 of 12

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