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Chemistry

Chemistry
Liquid Nitrogen boils at

54 kelvin
82 Kelvin
97 Kelvin
77 kelvin

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Chemistry
The metal used to recover copper from a solution of copper sulphate is

Na
Fe
Hg
Ag

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Chemistry
Carborundum is another name of

Silicon carbide
Calcium carbide
Silicon oxide
Calcium oxide

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Chemistry
The ionic radii of N3-, O2-, F- and Na+ follows the order

O2- > F- > Na+ > N3-
N3- > Na+ > O2- > F-
N3- > O2- > F- > Na+
Na+ > O2- > N3- > F-

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Chemistry
Domestic cooking gas consists mostly of

Liquified butane and isobutane
Ethylene and carbon monoxide
Hydrogen and acetylene
Methane and ethane

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Chemistry
The minimum energy required for an effective collision is

Activation energy
Threshold energy
Internal energy
Free energy

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MORE MCQ ON Chemistry

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