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Chemistry

Chemistry
The value of Avogadro Number is

6.023 × 1022
6.023 × 1023
6.023 × 1025
6.023 × 1024

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Chemistry
Detergents clean surfaces on the principle of

Elasticity
Viscosity
Surface tension
Floatation

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Chemistry
Commercial Vaseline is derived from

Petroleum
Plant gums
Coal tar
Wool wax

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Chemistry
The substance which does not expand on going from liquid state to solid state is

Type metal
Water
Aluminium
Cast-iron

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Chemistry
Which one of the following organic compounds has fruity smell?

Aldehyde
Ester
Alcohol
Ether

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Chemistry
The coating of a thin layer of zinc on steel or iron objects is known as

Tinning
Electroplating
Hot dipping
Galvanising

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