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Chemistry

Chemistry
Gold dissolves in

Nitric acid
Aqua-regia
Acetic acid
Hydrochloric acid

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Chemistry
The acid which fails to liberate carbon dioxide from sodium bicarbonate is :

Formic acid
Sulphuric acid
Acetic acid
Carbonic acid

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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 –

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

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Chemistry
Which of the following is used to increase the anti-knocking property of petrol ?

Tetraethyl lead
Trimethyl lead
Tetramethyl lead
Triethyl lead

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Chemistry
Which of the following is not a method of preparing oxygen?

Decomposition of manganese dioxide
Fractional distillation of liquid air
Electrolysis of water
Decomposition of potassium permanganate

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Chemistry
Normal rainwater is slightly acidic due to the presence of

Carbon dioxide
Methane
Sulphur dioxide
None of these

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MORE MCQ ON Chemistry

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