Chemistry Chapter 7 Thermochemistry Mcqs Test Online Punjab 11th Class

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Question 1 of 12

Chemistry

1. A bomb calorimeter is used in __________ calorimetric

Constant pressure

Both a and b

Constant temperature

Constant volume

Question 1 of 12

Question 2 of 12

2. Total heat content of a system is called

Internal energy

Enthalpy

State Function

Heat

Question 2 of 12

Question 3 of 12

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

Work done

Thermal energy at constant pressure

Enthalpy

Internal energy

Question 3 of 12

Question 4 of 12

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

All of these

Balloon

Oxygen

Freezer

Question 4 of 12

Question 5 of 12

5. 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

a, c, d

a, b, c, d

Question 5 of 12

Question 6 of 12

6. Calorie is equivalent to

0.418KJ

0.418J

4.18J

4.18KJ

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 formation of salt

The combination of H⁺ and OH ions to form water

The formation of salt and water

The complete ionization of acids and bases

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

None of these

O₃

Question 8 of 12

Question 9 of 12

9. 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 9 of 12

Question 10 of 12

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

Molecular solids

Ionic solids

Covalent solids

Metallic solids

Question 10 of 12

Question 11 of 12

11. q = ∆H when

∆V = 0

∆E = 0

P = 0

None of these

Question 11 of 12

Question 12 of 12

12. Heat of ________ of a substance is always negative

Combustion

Decomposition

Solution

Formation

Question 12 of 12

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