Reactions Due to Light

Q.

Classify the following reaction into exothermic and endothermic reactions-

Photosynthesis

Q. Which of the following reaction is an example of a photochemical reaction?

1. Bioluminescence in fireflies.
2. Dissolving pottasium permanganate in water
3. Dissolving ink droplets in water
4. Reaction of sodium with water

Q. Match the following process with their types.

1. Endothermic
2. Exothermic
3. Photochemical

Q. During bioluminescence, energy is converted to energy.

1. light
2. heat
3. chemical
4. sound

Q. A branch of chemistry that deals with chemical reactions involving light is ______.

1. thermochemistry
2. photochemistry
3. electrochemistry
4. hydrochemistry

Q.

Which of the following reaction(s) involves absorption of light to initiate?

1. Respiration

2. Photosynthesis

3. Combustion

4. Photochemical decomposition

Q. The chemical reactions which are initiated by are called photochemical reactions.

1. light
2. heat
3. electricity

Q.

Photosynthesis takes place is the presence of :

1. electricity
2. sunlight
3. heat
4. negative catalyst

Q. During photosynthesis plants produce starch using _____ and water.

1. oxygen
2. carbon dioxide
3. hydrogen
4. nitrogen