MEDIUM
7th CBSE
IMPORTANT
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Both the formation of mist and clouds involve the condensation of water vapour. In which aspect do they differ from each other? 

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Important Questions on Air and Oxygen

MEDIUM
7th CBSE
IMPORTANT
The CO that is added up to the atmosphere due to the incomplete combustion of fuels can be decreased by the: 
MEDIUM
7th CBSE
IMPORTANT
Y is obtained by the decomposition of a substance X. Oxygen present in X is univalent. Y reacts with a neutral oxide and evolves Z which is composed of reddish brown fumes which turns moist blue litmus to red. Identify X, Y and Z. 
 
MEDIUM
7th CBSE
IMPORTANT
Assume that temperature is recorded in the thermosphere with the help of a thermometer. You will be amazed to find that the temperature recorded in it will be extremely low. This is because: 
MEDIUM
7th CBSE
IMPORTANT
Cloud formation almost does not take place in the stratosphere because: 
MEDIUM
7th CBSE
IMPORTANT
Which of the following pairs is a major contributor to global warming?
MEDIUM
7th CBSE
IMPORTANT
Generally a metal gets corroded due to oxidation. Name a metal which becomes chemically resistant due to oxidation.
MEDIUM
7th CBSE
IMPORTANT
Which of the following processes does not contribute to the increase of suspended particulate matter in the atmosphere? 
MEDIUM
7th CBSE
IMPORTANT
Incomplete combustion of fuels does not contribute to: