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Chemistry

Chemistry
Zone refining is used for the purification of

Ge
Au
Cu
Ag

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Chemistry
Atomic number is the number equal to

Electrons
None of these
Neutrons
Protons

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Chemistry
The inherited traits of an organism are controlled by

enzymes
nucleotides
RNA molecules
DNA molecules

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Chemistry
Alcohol prepared by the distillation of wood is :

Glycerol
Propyl alcohol
Methyl alcohol
Ethyl alcohol

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Chemistry
The metal chiefly used for galvanising iron is :

Zinc
Cadmium
Tin
Mercury

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Chemistry
The number of electrons presents in H+ is

two
one
three
zero

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