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11th Class Chemistry Chapter 7 MCQs with Answers

11th Class Chemistry Chapter 7 MCQs

Revise energy-related concepts with Thermochemistry MCQs focused on enthalpy, heat transfer, and thermodynamic laws. Chapter 7 quizzes make 11th Class Chemistry easier to learn.

Thermochemistry is the study of:
a) Heat transfer between objects
b) Chemical reactions involving gases
c) Energy changes in chemical reactions
d) Thermodynamics of inorganic compounds

Answer
c) Energy changes in chemical reactions

Which of the following is an example of an exothermic reaction?
a) Melting ice
b) Photosynthesis
c) Evaporating water
d) Burning wood

Answer
d) Burning wood

The SI unit for heat energy is:
a) Joule
b) Calorie
c) Kelvin
d) Watt

Answer
a) Joule

The heat absorbed or released during a chemical reaction at constant pressure is called:
a) Enthalpy change
b) Entropy change
c) Internal energy change
d) Gibbs free energy change

Answer
a) Enthalpy change

The enthalpy change for an endothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
a) Positive

Hess’s law is based on the principle of:
a) Conservation of mass
b) Conservation of energy
c) Constant pressure
d) Constant volume

Answer
b) Conservation of energy

Which of the following statements is true about exothermic reactions?
a) Heat is absorbed from the surroundings
b) The enthalpy change is positive
c) The products have higher energy than the reactants
d) Heat is released to the surroundings

Answer
d) Heat is released to the surroundings

The enthalpy change in a chemical reaction depends on the:
a) Initial temperature of the reactants
b) Total mass of the reactants
c) Number of moles of reactants
d) Difference in enthalpy between products and reactants

Answer
d) Difference in enthalpy between products and reactants

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The process of combining two or more smaller nuclei to form a larger nucleus is called:
a) Fission
b) Fusion
c) Vaporization
d) Condensation

Answer
b) Fusion

The heat required to convert 1 gram of a solid into a liquid at its melting point is called:
a) Heat of fusion
b) Heat of vaporization
c) Heat of sublimation
d) Heat of condensation

Answer
a) Heat of fusion

The heat of vaporization is the heat required to:
a) Convert a liquid to a solid
b) Convert a solid to a gas
c) Convert a liquid to a gas
d) Convert a gas to a solid

Answer
c) Convert a liquid to a gas

The enthalpy change for an exothermic reaction is represented as:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The process of combining two or more smaller nuclei to form a larger nucleus is called:
a) Fission
b) Fusion
c) Vaporization
d) Condensation

Answer
b) Fusion

The heat required to convert 1 gram of a solid into a liquid at its melting point is called:
a) Heat of fusion
b) Heat of vaporization
c) Heat of sublimation
d) Heat of condensation

Answer
a) Heat of fusion

The heat of vaporization is the heat required to:
a) Convert a liquid to a solid
b) Convert a solid to a gas
c) Convert a liquid to a gas
d) Convert a gas to a solid

Answer
c) Convert a liquid to a gas

The enthalpy change for an exothermic reaction is represented as:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The process of combining two or more smaller nuclei to form a larger nucleus is called:
a) Fission
b) Fusion
c) Vaporization
d) Condensation

Answer
b) Fusion

The heat required to convert 1 gram of a solid into a liquid at its melting point is called:
a) Heat of fusion
b) Heat of vaporization
c) Heat of sublimation
d) Heat of condensation

Answer
a) Heat of fusion

The heat of vaporization is the heat required to:
a) Convert a liquid to a solid
b) Convert a solid to a gas
c) Convert a liquid to a gas
d) Convert a gas to a solid

Answer
c) Convert a liquid to a gas

The enthalpy change for an exothermic reaction is represented as:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The process of combining two or more smaller nuclei to form a larger nucleus is called:
a) Fission
b) Fusion
c) Vaporization
d) Condensation

Answer
b) Fusion

The heat required to convert 1 gram of a solid into a liquid at its melting point is called:
a) Heat of fusion
b) Heat of vaporization
c) Heat of sublimation
d) Heat of condensation

Answer
a) Heat of fusion

The heat of vaporization is the heat required to:
a) Convert a liquid to a solid
b) Convert a solid to a gas
c) Convert a liquid to a gas
d) Convert a gas to a solid

Answer
c) Convert a liquid to a gas

The enthalpy change for an exothermic reaction is represented as:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The process of combining two or more smaller nuclei to form a larger nucleus is called:
a) Fission
b) Fusion
c) Vaporization
d) Condensation

Answer
b) Fusion

The heat required to convert 1 gram of a solid into a liquid at its melting point is called:
a) Heat of fusion
b) Heat of vaporization
c) Heat of sublimation
d) Heat of condensation

Answer
a) Heat of fusion

The heat of vaporization is the heat required to:
a) Convert a liquid to a solid
b) Convert a solid to a gas
c) Convert a liquid to a gas
d) Convert a gas to a solid

Answer
c) Convert a liquid to a gas

The enthalpy change for an exothermic reaction is represented as:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The process of combining two or more smaller nuclei to form a larger nucleus is called:
a) Fission
b) Fusion
c) Vaporization
d) Condensation

Answer
b) Fusion

The heat required to convert 1 gram of a solid into a liquid at its melting point is called:
a) Heat of fusion
b) Heat of vaporization
c) Heat of sublimation
d) Heat of condensation

Answer
a) Heat of fusion

The heat of vaporization is the heat required to:
a) Convert a liquid to a solid
b) Convert a solid to a gas
c) Convert a liquid to a gas
d) Convert a gas to a solid

Answer
c) Convert a liquid to a gas

The enthalpy change for an exothermic reaction is represented as:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The process of combining two or more smaller nuclei to form a larger nucleus is called:
a) Fission
b) Fusion
c) Vaporization
d) Condensation

Answer
b) Fusion

The heat required to convert 1 gram of a solid into a liquid at its melting point is called:
a) Heat of fusion
b) Heat of vaporization
c) Heat of sublimation
d) Heat of condensation

Answer
a) Heat of fusion

The heat of vaporization is the heat required to:
a) Convert a liquid to a solid
b) Convert a solid to a gas
c) Convert a liquid to a gas
d) Convert a gas to a solid

Answer
c) Convert a liquid to a gas

The enthalpy change for an exothermic reaction is represented as:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

The specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of:
a) One mole of the substance by 1°C
b) One gram of the substance by 1°C
c) One liter of the substance by 1°C
d) One kilogram of the substance by 1°C

Answer
b) One gram of the substance by 1°C

The enthalpy change of a reaction is represented by the symbol:
a) ΔS
b) ΔG
c) ΔH
d) ΔU

Answer
c) ΔH

The enthalpy change for an exothermic reaction is:
a) Positive
b) Negative
c) Zero
d) Indeterminate

Answer
b) Negative

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