Question

ants.
are-
1.
(a) 78%
nis
ae
of
3.
rick () the correct option.
What is the percentage of nitrogen present in the atmosphere?
Ozone layer saves us from
(b) 21%
(c) 5%
(d) None of these
(a) Infrared radiations
(b) Visible radiations
(c) Ultraviolet radiations
(d) All of these
Which of the following gases is a greenhouse gas?
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen (d) Argon
Which of the following gases is released within the earth's crust in radioactive decay?
(a) Methane
(b) Nitrogen
(c) Radon
(d) Oxygen
Which of the following things release chlorofluorocarbon?
(a) Garbage
(b) Industrial waste
(c) Agriculture runoffs
(d) Refrigerators
Which of the following are harmful to human beings?
(a) The Suspended Particulate Matter(SPM) (b) Chlorofluorocarbon (CFC)
(c) Oxides of sulphur and nitrogen
(d) All of these
in the correct alternative from the brackets.
5.​

Answer 1

1.a is the answer

2.c is the answer

Explanation:

3. i think a and c is right

4.may be c is the answer

5.d is the answer

6.d is the answer