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Chemistry

Chemistry
Sulphur dioxide bleaches colouring matter by :

Reduction
Dehydration
Oxidation
Decomposition

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Chemistry
The most important ore of aluminium is

magnetite
haematite
monazite
bauxite

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Chemistry
The constituents of automobile exhaust that can cause cancer is/are :

Lead
Polycyclic hydrocarbons
Oxides of nitrogen
Carbon monoxide

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Chemistry
Which of the following is the main compound of voter ink?

Ammonium Chloride
Silver Chloride
Ammonium Nitrate
Silver nitrate

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Chemistry
Hardest allotrope of carbon is

Lamp black
Diamond
Graphite
Coke

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Chemistry
The resources which can be used continuously, year-after -year are called

Biotic
Renewable
Non-renewable
Abiotic

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