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Chemistry

Chemistry
Which is the purest commercial form of iron ?

Wrought iron
Pig iron
Steel
Stainless steel

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Chemistry
An element of atomic no. 29 belongs to

D-block
F-block
P-block
S-block

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Chemistry
Total number of elements in the Periodic table

127
118
115
112

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Chemistry
The gas that is used in the manufacture of vanaspati ghee is :

Hydrogen
Oxygen
Nitrogen
Carbon dioxide

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

Silver nitrate
Sodium nitrate
Sodium thiosulphate
Silver iodide

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Chemistry
Cloud is a colloidal dispersion of

Mist in a dispersion medium of air
Air in a dispersion medium of water
Fog in a dispersion medium of water
Water drops in a dispersion medium of air

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MORE MCQ ON Chemistry

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