9th Class General Science Chapter 6 Online MCQ Test With Answers PDF English Medium (Environment and Natural Resources)

General Science 9th Class English Medium Chapter 6 Online Test

Sr. #	Questions	Answers Choice
1	The main causes of depletion of ozone layer is	oxygen hydrogen chlorofluorocarbon hydrocarbon
2	The coldest layer of the atmosphere	Troposphere&nbsp Stratosphere&nbsp Mesosphere&nbsp Thermosphere&nbsp
3	Where the ozone make a protective layer?	Troposphere&nbsp Stratosphere&nbsp Mesosphere&nbsp Thermosphere &nbsp
4	The height of stratosphere above earth's is surface is:	18 km 25 km&nbsp 50 km&nbsp 100 km&nbsp
5	The temperature in the mesosphere is	-10°C -100°C -60°C -80°C
6	The percentage of carbon dioxide in Air is:	40% 0.4% 0.04% 33%
7	The percentage of oxygen in Air is	78% 21% 0.04% 33%
8	The thickness of Atmosphere is	100 km 200 km&nbsp 300 km&nbsp 400 km&nbsp