Question

1. Air
A. Choose the correct option:
4
1. Which of the following has the major part in air?
2. Air
a. Nitrogen
b. Oxygen
c. Lithosphere
3. W
d. Biosphere
2. Which gas present in atmosphere allows substances to burn?
D.N
a. Nitrogen
b. CO2
cc. Oxygen
d. Ozone
1.
1
3. Green plants synthesize their food by utilizing.............
from air.
2
a, Carbon dioxide
b. Nitrogen
c. Oxygen
d. Helium
4. Which of the following process need oxygen?
a. Combustion
b. Respiration
c. Oxidation
d. All of these
5. Which of the following plays a very important role in the oxygen cycle?
a. Birds
b. Animals
c. Plants
d. Soil
6. Which of the constituents of air on increasing, causes golbal warming?
a. Nitrogen
b. Oxygen
c. Inert gas
d. Carbon dioxide​

Answer 1

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1. Nitrogen
2. Ozone
3. Carbon Dioxide
4. All Of these
5. Plants
6. Carbon dioxide

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Answer 2

Answer:

1. Air

A. Choose the correct option:

4

1. Which of the following has the major part in air?

2. Air

a. Nitrogen

b. Oxygen

c. Lithosphere

3. W

d. Biosphere

2. Which gas present in atmosphere allows substances to burn?

D.N

a. Nitrogen

b. CO2

cc. Oxygen

d. Ozone

1.

1

3. Green plants synthesize their food by utilizing.............

from air.

2

a, Carbon dioxide

b. Nitrogen

c. Oxygen

d. Helium

4. Which of the following process need oxygen?

a. Combustion

b. Respiration

c. Oxidation

d. All of these

5. Which of the following plays a very important role in the oxygen cycle?

a. Birds

b. Animals

c. Plants

d. Soil

6. Which of the constituents of air on increasing, causes golbal warming?

a. Nitrogen

b. Oxygen

c. Inert gas

d. Carbon dioxide​

                                             

Explanation:

Hey friend, the answers have been highlighted with a bold , italic and underlined style above in the answer ..

1. Air

A. Choose the correct option:

4

1. Which of the following has the major part in air?

2. Air

a. Nitrogen

b. Oxygen

c. Lithosphere

3. W

d. Biosphere

(iT IS NITROGEN ACCORDING TO THE PIE CHART OF THE COMPOSITION OF AIR..)

2. Which gas present in atmosphere allows substances to burn?

D.N

a. Nitrogen

b. CO2

cc. Oxygen

d. Ozone

(OXYGEN IS A VERY NECESSARY FOR SUBSTANCES TO BURN)

3. Green plants synthesize their food by utilizing.............

from air.

2

a, Carbon dioxide

b. Nitrogen

c. Oxygen

d. Helium

(DURING THE PROCESS OF PHOTOSYNTHESIS , PLANTS TAKE IN CARBON-DIOXIDE TO PREPARE FOOD)

4. Which of the following process need oxygen?

a. Combustion

b. Respiration

c. Oxidation

d. All of these

(AS GIVEN ABOVE  FIRE REQUIRES OXYGEN AND WE INTAKE OXYGEN FOR RESPIRATION AND ALSO OXIDATION REQUIRES OXYGEN)

5. Which of the following plays a very important role in the oxygen cycle?

a. Birds

b. Animals

c. Plants

d. Soil

(PLANTS GIVE OUT OXGEN IN THE PHOTOSYNTHESIS PROCESS . WITHOUT PLANTS, THE OXYGEN CYCLE WILL BE INCOMPLETE)

6. Which of the constituents of air on increasing, causes golbal warming?

a. Nitrogen

b. Oxygen

c. Inert gas

d. Carbon dioxide​

(CARBON-DIOXIDE IS SAID TO TRAP A LOT OF HEAT ..)

HOPE THESE ANSWERS WITH THEIR EXPLANATIONS HELPS YOU TO UNDERSTAND HOW AND WHY THE ANSWERS CAME>..