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Chemistry

Chemistry
What is the covalency of nitrogen in ammonia molecule

3
2
4
5

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Chemistry
The metal present in vitamin B12 is

Fe
Mo
Mg
Co

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Chemistry
Which among the following is used as a catalyst in the production of high octane fuels?

HNO3
H2SO4
HF
HCl

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Chemistry
Diamonds are glittering and attractive because light incident on them undergoes

Multiple surface reflections
Multiple internal reflections
Hundred percent transmission
Highest refraction

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Chemistry
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

Uncertainty Principle of Hiesenberg
Hund's rule of maximum multiplicity
Avogadro's Law
Exclusion Principle of Pauli

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Chemistry
The chemical that is used to ripen mangoes is

Calcium carbide
Calcium carbonate
Calcium sulphide
Calcium chloride

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MORE MCQ ON Chemistry

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