Chemistry Chapter 7 Thermochemistry Mcqs Test Online Punjab 11th Class

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Question 1 of 12

Chemistry

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

Thermal energy at constant pressure

Enthalpy

Work done

Internal energy

Question 1 of 12

Question 2 of 12

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

Freezer

Balloon

All of these

Oxygen

Question 2 of 12

Question 3 of 12

3. q = ∆H when

∆V = 0

None of these

∆E = 0

P = 0

Question 3 of 12

Question 4 of 12

4. 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

a, b, c, d

a, b

a, c, d

Question 4 of 12

Question 5 of 12

5. A bomb calorimeter is used in __________ calorimetric

Constant temperature

Constant pressure

Constant volume

Both a and b

Question 5 of 12

Question 6 of 12

6. Total heat content of a system is called

Heat

Enthalpy

State Function

Internal energy

Question 6 of 12

Question 7 of 12

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

Covalent solids

Molecular solids

Metallic solids

Ionic solids

Question 7 of 12

Question 8 of 12

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

None of these

ZnO

O₃

H₂O

Question 8 of 12

Question 9 of 12

9. Calorie is equivalent to

0.418KJ

4.18KJ

0.418J

4.18J

Question 9 of 12

Question 10 of 12

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

The combination of H⁺ and OH ions to form water

The complete ionization of acids and bases

The formation of salt

The formation of salt and water

Question 10 of 12

Question 11 of 12

11. 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

Cannot be predicted form the given equation

+393.5 KJ

-393.5 KJ

Zero

Question 11 of 12

Question 12 of 12

12. Heat of ________ of a substance is always negative

Combustion

Formation

Decomposition

Solution

Question 12 of 12

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