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Chemistry

Chemistry
Which among the following is found in chlorophyll ?

Ca2+
Fe2+
Mg2+
A l3+

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

Water
Cast-iron
Type metal
Aluminium

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Chemistry
In chemical terms, what are alums used for purifying water for drinking purposes ?

Nitrates of aluminium
Double nitrate
Double sulphates
Hydrated chlorides

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Chemistry
What is the mass percentage of carbon in carbon dioxide (CO2)

0.201
0.158
0.323
0.273

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Chemistry
Ultraviolet rays can be used in water treatment as

Hydrolyser
Disinfectant
Flocculator
Precipitator

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Chemistry
Which one of the following is not a ‘green house gas’ ?

Methane
Chlorofluorocarbons
Carbon dioxide
Nitrogen

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MORE MCQ ON Chemistry

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