________ present in air helps in combustion of fuel. a) oxygen b)nitrogen c)carbon-di-oxide d)carbon –mono-oxide Answer : a) oxygen...
Increase in temperature due to excess of carbon dioxide in air which traps heat energy is known as _______ . a) global warming b)soot c)ash d)acid rain Answer : a) global warming...
The _________ gas produced during burning of coal is responsible for causing acid rain . a) oxygen b)sulphur dioxide c)nitrogen d)water vapour Answer : b)sulphur dioxide...
On placing an inverted tumbler over a burning candle, the flame extinguishes after some – time . This is because of non –availability of a) oxygen b)water vapour c)carbon dioxide d)wax Answer : a) oxygen...
Carbon monoxide is a poisonous gas for one of the following reasons. w) it is a powerful acid anhydride x) it combines with the hemoglobin of the blood y) it depletes the dissolved oxygen in the blood by forming carbon dioxide z) it is a strong oxidizing agent Answer : ANSWER: X -- IT COMBINES WITH THE HEMOGLOBIN OF THE BLOOD ...
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