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Chemistry

Chemistry
Ultra purification of a metal is done by :

Zone melting
Leaching
Slugging
Smelting

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Chemistry
The chemical name of 'Hypo' commonly used in photography is

Silver iodide
Sodium nitrate
Silver nitrate
Sodium thiosulphate

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Chemistry
How many electrons can be accommodated in d-orbital

3
8
6
10

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Chemistry
The substance which does not expand on going from liquid state to solid state is

Aluminium
Type metal
Cast-iron
Water

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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
The coloured discharge tubes for advertisement mainly contain

Neon
Xenon
Argon
Helium

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MORE MCQ ON Chemistry

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