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CLASS – 10, , SONU CLASSES, 46, BHAIRAB DUTTA LANE NANDI BAGAN SALKIA HOWRAH – 6, M. – 8961678250, 7003499494, CLASS – X, SUBJECT – PHYCICAL SCIENCE, CONCERN ABOUT OUR ENVIROMENT, 1.What of the following greenhouse gases has maximum contribution towards global, warming?, Ans- CO2, 2.Which of the following is not a greenhouse gas?, Ans- Oxygen, 3.In which layer of atmosphere radio waves get reflected?, Ans- Ionosphere, 4.Which one is responsable for destroys of ozone layer?, Ans- CFC, 5.In which of the following layer of atmosphere ozone gas is found?, Ans- Stratosphere, 6.In which layer of atmosphere do storm occur?, Ans- Troposphere, 7.Which gas absorbs the ultra violet rays of sun?, Ans- Ozone, 8.Weather balloons reach upto which layer of atmosphere?, Ans- Stratosphere, 9.Which gas does not harm ozone layer?, Ans- Hydrogen, 10.Which gas is an ozone depleting gas?, Ans- Chlorine, 11.Which is a renewable source of energy?, Ans- Wind energy, 12.Which fuel has the highest calorific value?, Ans- Hydrogen gas, 13.Which element found in CFC destroys ozone?, Ans- Chlorine, 14.The decreases of temperature at troposphere layer with per kilometre increases in height, is?, Ans- 6oC, 15.The ray absorbed by the ozone layer of the atmosphere is?, Ans- UV light, 16.The example of a bio – fuel is?, Ans- Cow – dung, , SONU CLASSES
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CLASS – 10, 17.Which one is not green house gas?, Ans- O2, 18.Strongest green house gas is?, Ans- CFC [chloro fluoro carbon], 19.Which one is the prime green house gas?, Ans- CO2, 20.A source of non – conventional energy is?, Ans- Bio- gas, , THANK YOU, , SONU CLASSES