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Chemistry

Chemistry
Gold dissolves in

Hydrochloric acid
Nitric acid
Aqua-regia
Acetic acid

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Chemistry
The value of gas constant R in Ergs deg–1 mole–1 is

8.413 × 107
8.314 × 107
8.341 × 107
4.183 × 107

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Chemistry
Heating of a ore below its melting point in the absence of air is known as

Roasting
Refining
Smelting
Calcination

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Chemistry
The iron ore magnetite consists of

3Fe2O3 .. 3H2O
Fe3OH4
Fe2O3
FeCO3

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Chemistry
Piped Natural Gas (PNG) is used for

Welding
Cooking
Anaesthesia
Mining

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Chemistry
Which of the following elements is found in all organic compounds

Nitrogen
Carbon
Oxygen
Calcium

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MORE MCQ ON Chemistry

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