Question

1. Which is the main constituent of proteins?
a. carbon
b. carbon dioxide
c. nitrogen
2. Where can you find nitrogen-fixing bacteria?
a. soil
b. the root n
d. both a and
C. water
3. Which of the following is released during respiration?
a. oxygen
b. water vapour
c. nitrogen
4. Which of the following is used as a rocket propellant?
a. liquid oxygen
b. dry ice
c. hydrogen
5. Which of the following is used in the manufacture of urea?
a. oxygen
b. argon
c. hydrogen
6. Which of the following is a greenhouse gas?
a. methane
b. oxygen
C. nitrogen​

Answer 1

Answer:

1. c.Nitrogen

2. b. In the Roots of leguminious plants

3. b.Water Vapour

4. c. Hydrogen

5. b. Argon

6. a. Methane

Answer 2

Answer:

1 . c

2. a

3. a

4.a

5.b

6.a

THESE ARE YOUR ANSWERS