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Chemistry

Chemistry
In deep-sea diving, divers use a mixture of gases consisting of oxygen and

Hydrogen
Nitrogen
Helium
Argon

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Chemistry
Trinitrotoluene is

Used as an explosive
Used as an abrasive
Used to melt metals
Used to fuse two metals

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Chemistry
The structure of NaCl crystal is

Square planar
Octahedral
Body centered cubic
Face centered cubic

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Chemistry
What is the atomic number of mercury

63
80
41
32

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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

Raman spectra
Emission spectra
Absorption spectra
Fluorescence

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

Ammonia
Nitramines
Nitrates
Nitrites

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MORE MCQ ON Chemistry

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