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CHEMISTRY

Chemistry
KMnO4 can be used as a/an

Pesticide
Insecticide
Disinfectant
Fertiliser

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Chemistry
The chemical name of 'laughing gas' is

Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide

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Chemistry
Which of the following is used in welding broken pieces of iron rails and machine parts?

Aluminium sulphate
Solder
Aluminium powder
None of these

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Chemistry
Of the following commonly used materials, the one that is not an alloy is

Steel
Copper
Bronze
Brass

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Chemistry
The manufacture of iron from iron ore involves the process of

Fractional distillation
Oxidation
Electrolysis
Reduction

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