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Chemistry

Chemistry
White phosphorus is generally kept under

Kerosene oil
Water
Alcohol
Glycerine

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Chemistry
Chemical name of vinegar is

Ethanol
Acetone
Formaldehyde
Acetic acid

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Chemistry
The element which is used for vulcanizing rubber

Bromine
Phosphorus
Silicon
Sulphur

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Chemistry
Hard steel contains

0.5 to 1.5 per cent carbon
2 to 5 per cent carbon
0.1 to 0.4 per cent carbon
0.01 to 0.04 per cent carbon

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Chemistry
The main buffer system of the human blood is

H2CO3 - CO32-
H2CO3 - HCO3
CH3COOH - CH3COO-
NH2CONH2 - NH2CONH+

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Chemistry
Nitric acid does not react with

Iron
Gold
Copper
Zinc

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MORE MCQ ON Chemistry

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