Respiration & Photosynthesis

Q. During the process of respiration, ______ is released.

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

Q.

In which of the following process new substance(s) are formed?

1. Melting of ice

2. Sublimation of naphthalene

3. Photosynthesis

4. All of these

Q. WRITE THE BALANCED EQUATION FOR THE FOLLOWING : 1 BURNING OF GAS
2 THE PROCESS OF RESPIRATION

Q. During photosynthesis, energy is converted to energy.

1. chemical
2. light
3. electrical
4. potential

Q. Identify a natural chemical change which gives out a gas that turns lime water milky.

1. Respiration
2. Photosynthesis
3. Combustion of petrol
4. Softening of hard water

Q.

Which of the following are natural chemical changes?

1. Respiration
2. Photosynthesis
3. Explosion of fire works
4. Combustion of fuels

Q. Complete the missing links for respiration-
+ Oxygen $⟶$ + Water + Energy

1. Glucose
2. Hydrogen
3. Carbon monoxide
4. Carbon dioxide

Q. Which among the following are given out during respiration?

1. Carbon dioxide
2. Water
3. Glucose
4. Hydrogen

Q. Which of the following is not an example of a chemical reaction?

1. Melting of ice
2. Burning of firewood
3. Rusting of iron rod
4. Bubbling of Pepsi