Question

Ozone found in the is “good” ozone which plays a beneficial role by absorbing dangerous

ultraviolet (UV-B) radiation from the Sun. Without this beneficial ozone layer, humans would be

more susceptible to certain diseases due to the increased incidence of ultra-violet rays from the

Sun. In the last decades the amount of ozone has decreased. In 1974 it was hypothesised that

chlorofluorocarbons (CFCs) could be a cause for this. However, in September 1987, diplomats

from around the world met in Montreal (Canada) and agreed to set sharp limits to the use of CFCs.

1. Ozone in stratosphere is formed from oxygen with the help of ________

a. UV rays b. Infrared rays c. CFCs d. X rays



2. __________ is not a source of CFCs.

a. cooler b. refrigerator c. air-conditioner d. perfume sprayer

3. The Law of constant proportion was proposed by

(a)John Dalton (b) Avogadro (c) Joseph Proust (d) A.Lavoisier

4. Which of the following is the correct symbol for nitrogen gas?

(a)N (b) N 2 (c) N3 (d) Ni

5. Which of the following quantity is constant from planet to planet?

(a) acceleration due to gravity (b) mass (c) weight (d) all​

Answer 1

Explanation:

a)UV RAYS

2)COOLER

3)DALTON

4)N2

5)MASS.

DEADSOUL ✝️☠️