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Chemistry

Chemistry
Depletion of ozone layer causes

Skin cancer
Breast cancer
Blood cancer
Lung cancer

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Chemistry
Atoms having the same number of protons but different number of neutrons are called :

Cations
Anions
Isotopes
Higgs-boson

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

4
2
1
3

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Chemistry
The gas used in the manufacture of vanaspati from vegetable oil is

hydrogen
oxygen
nitrogen
carbon dioxide

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Chemistry
Bayer's reagent is

Acidified potassium permanganate
Bromine water
Hydrogen peroxide
Alkaline potassium permanganate

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Chemistry
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?

1/6
1/8
1/3
1/4

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MORE MCQ ON Chemistry

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