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Chemistry

Chemistry
A pungent smell often present near the urinals is due to

Sulphur-di- oxide
Urea
Chlorine
Ammonia

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Chemistry
The element used in the manufacture of safety matches is

Phosphorous
Magnesium
Sulphur
Silicon

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Chemistry
Gold dissolves in

Nitric acid
Hydrochloric acid
Aqua-regia
Acetic acid

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Chemistry
If the sewage is fully oxidized, the nitrogen is in the form of

Nitrites
Nitramines
Nitrates
Ammonia

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Chemistry
When a metal is heated in a flame, the electrons absorb energy and jump to higher energy state. On coming back to the lower energy siate, they emit light, which we can observe in

Absorption spectra
Emission spectra
Raman spectra
Fluorescence

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Chemistry
Sour taste of lemon is due to the presence of which of the following ?

Oxalic acid
Citric acid
Formic acid
Acetic acid

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MORE MCQ ON Chemistry

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