Exothermic and Endothermic Reaction

Q.

The reaction in which heat and light are liberated is called endothermic reaction.

1. Endothermic reaction

2. Exothermic reaction

Q.

A student mixes quick lime and water in a test tube and touches its side surface. Which of the following statement correctly describes the student's observation?

1. The test tube becomes cold due to release of heat energy.

2. The test tube becomes hot due to release of heat energy.

3. The test tube becomes cold due to absorption of heat energy.

4. The test tube becomes hot due to absorption of heat energy.

Q.

Which of the following reactions are exothermic in nature?

(i) Evaporation of water
(ii) Dissolution of sodium hydroxide in water
(iii) Dilution of sulphuric acid
(iv) Dissolution of ammonium chloride in water
(v) Combustion of methane gas

1. (i), (iv) and (v) only
2. (ii), (iii) and (v) only
3. (i), (ii) and (iv) only
4. (i), (iii) and (iv) only

Q. Correct the following statement: The reaction between hydrogen and oxygen is exothermic.

Q. Which of the following are endothermic process?

1. Boiling of water
2. Dissolving salts in water
3. Dissolving conc. $H_{2}S{O}_4$ in water
4. Evaporation of water
5. All of the above

Q. Digestion of food is an exothermic process.

1. True
2. False

Q.

When hydrochloric acid is added to magnesium, which gas is liberated?

1. Chlorine

2. Hydrogen

3. Oxygen

4. Nitrogen

Q.

Which of the following reactions are exothermic in nature?

1. Evaporation of water
2. Dissolution of sodium hydroxide in water
3. Dilution of sulphuric acid
4. Combustion of methane gas

Q. Respiration is an endothermic process.

1. False
2. True

Q.

What are the characteristics of Nitrated Cotton or Nitro - Cellulose?

1. Burns spontaneously

2. Leaves no residue

3. Turns green while burning

4. All of these

Q. A process in which heat is released along with the formation of products is called a/an reaction.

1. Endothermic
2. Exothermic
3. Precipitation

Q. The chemical reaction in which heat energy is released is known as ___________ reaction.

1. endothermic reaction
2. decomposition reaction
3. exothermic reaction
4. displacement reaction

Q. Formation of snow in a cloud is an example of:

1. Endothermic reaction
2. Decomposition reaction
3. Exothermic reaction
4. Displacement reaction

Q. Read the following statements and choose the correct option:
Statement 1: Burning of magnesium ribbon is an exothermic reaction.
Statement 2: Decomposition of potassium nitrate is an endothermic reaction.

1. Statement 1 is correct and statement 2 is wrong.
2. Statement 1 is wrong and statement 2 is correct.
3. Both statements are correct.
4. Both statements are wrong.

Q. What kind of chemical reaction takes place when petroleum is formed?