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Chemistry

Chemistry
The gas used for filling weather balloons is

Helium
Nitrogen
Hydrogen
Air

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Chemistry
Which one of the following is used as a sowing agent in the preparation of soft drinks?

Salicylic acid
Boric acid
Phosphorus acid
Phosphoric acid

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Chemistry
Sea water is saltier than rain water because

Rivers wash away salts from earth and pour them into the sea
The air around the sea is saltish
Sea beds have salt producing mines
Sea animals are salt producing

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Chemistry
What is the chemical symbol of mercury

Mr
Hg
Mg
None of these

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Chemistry
The important ore of aluminium is

Fluorspar
Cryolite
Bauxite
Haematite

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Chemistry
The unit of ionic product of water (Kw) is :

Mol-1 let-2
Mol2 let-1
Mol2 let-2
Mol-1 let-1

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MORE MCQ ON Chemistry

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