Chemistry 10th Class English Medium Unit 14 Online Test With Answers

image
image
image

Chemistry 10th Class English Medium Unit 14 Online Test

Sr. # Questions Answers Choice
1 Atmospheric region found between 50-58 km from the earthis. Thermosphere Stratosphere Mesophere Thermosphere
2 The percentage of sun light absorbed by atmospheric gases is. 2% 10% 18% 25%
3 The percentage by volume of nitrogen in dry gas is. 78.09% 20.94% 0.93% 0.03%
4 The envelope of different gases around the earth is called. Atmosphere Brosphere Lithosphere Hydrosphere
5 Atmosphere has regions. One Two Three Four
6 Earth has natural systems. One Two Three Four
7 Carbon monoxide is harmful to us because. It paralyses the lungs. It damages lungs tissues. It reduces oxygen carrying ability of haemoglobin It makes the blood coagulate.
8 Global warming is because of. Absorption of infrared radiation emitted by earth surface. Absorption of infrared radiation coming from sun. Absorption of infrared Ultraviolet coming from the sun. Emission of ultraviolet radiation from the earth's surface.
9 The process by which atmospheric nitrogen is turned into nitrates in the soil is called. Nitration Fixing Oxidation Reduction
10 Which one of these pollutants are not found in car exhaust fumes? CO<sub>2</sub> O<sub>3</sub> NO<sub>2</sub> SO<sub>2</sub>
11 Effects of ozone depletion are following except the one. Increases infectious diseases Increases crops production Can cause skin cancer Can cause climatic changes.
12 Which gas protects the Earth's surface from ultraviolet radiations? CO<sub>2</sub> CO N<sub>2</sub> O<sub>3</sub>
Download This Set
×