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Subjects
Science State Board
Class 8
Changes around us
Effects and indicators of chemical change
7.
Greenhouse effect and ozone layer: choose the correct option
Exercise condition:
3
m.
1
.
The use of cleaner fuel _____ will reduce the pollution.
Farming
UV rays
CNG
2
.
The chemicals that release chlorine and bromine when exposed to intense ultraviolet light in the stratosphere are called as _______ substances.
Ozone-depleting
Tsunami
None of these
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