Chemistry Chapter 7 Thermochemistry Mcqs Test Online Punjab 11th Class

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Question 1 of 12

Chemistry

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

Oxygen

Freezer

Balloon

All of these

Question 1 of 12

Question 2 of 12

2. 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

Zero

+393.5 KJ

Question 2 of 12

Question 3 of 12

3. Total heat content of a system is called

Enthalpy

State Function

Heat

Internal energy

Question 3 of 12

Question 4 of 12

4. A bomb calorimeter is used in __________ calorimetric

Both a and b

Constant temperature

Constant pressure

Constant volume

Question 4 of 12

Question 5 of 12

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

Ionic solids

Molecular solids

Metallic solids

Covalent solids

Question 5 of 12

Question 6 of 12

6. Heat of ________ of a substance is always negative

Decomposition

Solution

Formation

Combustion

Question 6 of 12

Question 7 of 12

7. 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, b, c, d

a, b

a

a, c, d

Question 7 of 12

Question 8 of 12

8. q = ∆H when

None of these

P = 0

∆E = 0

∆V = 0

Question 8 of 12

Question 9 of 12

9. Calorie is equivalent to

4.18KJ

4.18J

0.418J

0.418KJ

Question 9 of 12

Question 10 of 12

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

Thermal energy at constant pressure

Enthalpy

Internal energy

Work done

Question 10 of 12

Question 11 of 12

11. 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 11 of 12

Question 12 of 12

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

O₃

ZnO

None of these

H₂O

Question 12 of 12

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