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Chemistry

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

1
4
2
3

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Chemistry
Bleaching powder is prepared by passing :

Carbon dioxide over slaked lime
Oxygen over slaked lime
Chlorine over quick lirne
Chlorine over slaked lime

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Chemistry
The function of sedimentation tank in sewage treatment is to:

Aerate the sewage
Remove water content
Remove suspended solids
Disinfect the sewage

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Chemistry
Gas released during Bhopal tragedy was :

Potassium isothiocyanate
Sodium isothiocyanate
Ethyl isothiocyanate
Methyl isothiocyanate

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Chemistry
A mixture of water and alcohol can be separated by

Filtration
Evaporation
Distillation
Decantation

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Chemistry
Chemical formula of washing soda is

Ca(OH)2
Na2CO3.10H2O
Na2SO4.10H2O
NaHCO3

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MORE MCQ ON Chemistry

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