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Chemistry

Chemistry
A subshell with l=2 can take up

5 electron
3 electron
10 electron
8 electron

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Chemistry
Acid rain is caused due to emission of which of the following in to the atmosphere ?

Carbon dioxide and carbon monoxide
Ozone and carbon dioxide
Carbon monoxide and nitrogen
Oxides of nitrogen and sulphur

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Chemistry
Now-a-days yellow lamps are frequently used as street lights. Which of the following gases is used in these lamps ?

Nitrogen
Neon
Hydrogen
Sodium

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Chemistry
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is

oxygen
ozone
methane
helium

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Chemistry
Which of the following is not present in RNA

Uracil
Thymine
Ribose
Phosphate

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Chemistry
Number of6.023 × 1020 atoms present in one mole of a gas at STP is

'6.023 × 10–23
6.023 × 1020
'6.023 × 10–20
6.023 × 1023

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