Exothermic and Endothermic Reaction

Q. Assertion(A): Photosynthesis is an endothermic reaction.
Reason(R): Energy gets released in the process of photosynthesis.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true and R is the not the correct explanation of A.
3. A is true but R is false.
4. A is false but R is true.

Q.

Chemical reaction in which heat energy liberated is called _______________________.

Q. During photosynthesis, the light energy is converted to chemical energy that is later used by the green plants for their activities. This is an example of ________________ reaction.

1. Endothermic

2. Exothermic

3. Combination

4. Substitution

Q.

Reactions taking place in the presence of light are called photo reactions.

1. True
2. False

Q. Which of the following are exothermic processes?
I. Melting ice cubes
II. Respiration
III. Burning of a candle
IV. Evaporation of water

1. I only
2. I & II
3. I & III
4. II & III

Q. During photosynthesis, the light energy is converted to chemical energy that is later used by the green plants for their activities. This is an example of ________________ reaction.

1. endothermic
2. exothermic
3. precipitation
4. combination

Q.

In photosynthesis the light energy (from the sun) is converted to chemical energy which can be used to perform the activities of the organism. This is an example of ________________ reaction.

1. Exothermic

2. Combination

3. Endothermic

4. Substitution