Scan to download the App
E M B I B E
Eduwiser's CBSE BIOLOGY For Class X
>
Chapter 5 - Our Environment
>
EXERCISE
>
Q 34
Share
EASY
10th CBSE
IMPORTANT
Earn 100
Ozone hole refers to
(a)
Hole in ozone layers
(b)
Reduction in thickness of ozone layer in stratosphere
(c)
Reduction of thickness of ozone in troposphere
(d)
Both (B) and (C)
50% students
answered this correctly
Check
Important Questions on Our Environment
MEDIUM
10th CBSE
IMPORTANT
Eduwiser's CBSE BIOLOGY For Class X
>
Chapter 5 - Our Environment
>
EXERCISE
>
Q 35
Ozone layer of stratosphere requires protection from indiscriminate use of
