Question

STD : 8th
SUBJECT: SS
DATE:/09/2020
Q1 Choose the correct option from the alternatives given below.
1. Which gas is most effective as a greenhouse gas?
A Hydrogen
B. Oxygen
C. Nitrogen
D. Carbon dioxide
2. Which of the following gases is known as a green-house gas?
A Oxygen B. Hydrogen
C. Methane D. Nitrogen
3. How many tones of methane is produced by paddy cultivation?
A 15 crore B. 12 crore C. 7 crore
D. 21 crore
4 How many tones of methane is produced by decomposition of bio-
degradable
waste?
A 7 crore
B. 2 crore
C. 9 crore D. 11, crore
5. How many tones of methane is produced due to exhaling and
metabolism of
animals?
A 15 crore B. 7 crore
C. 18 crore D. 14 crore​

Answer 1

1. hydrogen

2. methane

3. 7 crore

4. 9 crore

5. 14 crore