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Chemistry

Chemistry
The length of double bond is _______ than single bond

Longer
Shorter
Of same lenght
None of these

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Chemistry
Which of the following is a commercial source of energy?

Natural gas
Sun
Dried dung
Agricultural waste

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Chemistry
The greenhouse effect is caused by the higher level of which gas in the atmosphere ?

Carbon monoxide
Nitrous oxide
Carbon dioxide
Sulphur dioxide

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Chemistry
In the electroplating of gold, the electrolyte used is

Gold nitrate
Potassium aurocyanide
Gold sulphate
Gold chloride

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Chemistry
Total number of halogen elements found in the periodic table is

5
13
3
8

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Chemistry
Water can be separated from alcohol water mixture by

Sublimation
Decantation
Distillation
Evaporation

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