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Q 1.
When sufficient oxygen is not available, combustion of methane produces?
Ans.
Carbon monoxide.
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Q 2.
Combustion of a substance releases heat and?
Ans.
Light.
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Q 3.
Which gas is highest calorific value?
Ans.
LPG.
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Q 4.
Name the glass that is used for making utensils?
Ans.
Potash glass.
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Q 5.
Name the glass that is used for making test tube, tubelights and bottles?
Ans.
Soda glass.
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Q 6.
Which is medium, slippery and most usable coal?
Ans.
Bituminous.
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Q 7.
Name the glass used for making of eye glasses?
Ans.
Crown glass.
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Q 8.
Which glass is used for making camera, lenses of telescope and prism?
Ans.
Flint glass ( lead glass).
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Q 9.
Name the games which are responsible for acid rain?
Ans.
Sulphur dioxide and Nitrogen oxide.
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Q 10.
Name the gas which is released by petrol engines?
Ans.
Nitrogen oxide.
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Q 11.
Name the glass that is used for making laboratory equipment?
Ans.
Pyrex glass.
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Q 12.
Name the gas that is released when coal and diesel burns?
Ans.
Sulphur dioxide.
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Q 13.
Which glass is used fir making lenses of goggles?
Ans.
Photo chromic glass and Crookes glass.
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Q 14.
Full form of LPG?
Ans.
Liquified Petroleum Gas.
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Q 15.
Full form of LPG?
Ans.
Liquified Petroleum Gas.
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Q 16.
Name the gas which is filled in a gas lighter?
Ans.
Butane.
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Q 17.
What does the rubbing surface of safety match contain?
Ans.
Red phosphorus.
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Q 18.
Name the unit of calorific value of fuel?
Ans.
Kilo joule per kg.
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Q 19.
Name the zone of a candle flame is the hottest part?
Ans.
Outer zone.
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Q 20.
Name the substance that catches fire in its lowest temperature?
Ans.
Ignition temperature.
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