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Chemistry

Chemistry
The major constituent of air is

nitrogen
hydrogen
oxygen
carbon dioxide

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Chemistry
The hydronium ion is

HO -
H3O+
H+
H2+

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Chemistry
Submarines move under water. They have engines that run on

Petrol and oxygen
Steam
Diesel
Batteries

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Chemistry
The acid which is secreted by the glands in the stomach wall is

Hydrochloric acid
Sulphuric acid
Phosphoric acid
Nitric acid

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Chemistry
Conversion of chemical energy into electrical energy occurs in

A battery
Dynamo
Atomic bombs
Electric heaters

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Chemistry
Which mineral is the ore of aluminium ?

Haematite
Siderite
Bauxite
Magnetite

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MORE MCQ ON Chemistry

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