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Chemistry

Chemistry
In vulcanisation process, rubber can be hardened by adding

Sulphur
Nitrogen
Silicon
Alcohol

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Chemistry
The electronic configuration of an atom having atomic number ‘20’ is

2, 6, 8, 4
2, 8, 8, 2
2, 10, 8
2, 8, 10

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Chemistry
Cement containing excess amount of lime

Is quick setting
Cracks during setting
Becomes more strong
Is slow setting

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Chemistry
The number of hydrogen bonds between guanine and cytosine in DNA is

3
1
2
4

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Chemistry
Which one of the following is not a ‘green house gas’ ?

Nitrogen
Chlorofluorocarbons
Methane
Carbon dioxide

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Chemistry
Molality of pure water is

55.5
5.55
18
1.8

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MORE MCQ ON Chemistry

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