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Chemistry

Chemistry
The element which is used for vulcanizing rubber

Phosphorus
Bromine
Silicon
Sulphur

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Chemistry
Galvanization is the :

Deposition of tin on iron
Deposition of copper on iron
Deposition of zinc on iron
Deposition of aluminium on iron

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Chemistry
The metal present in vitamin B12 is

Co
Fe
Mo
Mg

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Chemistry
The heat energy produced when the human body metabolises 1 gram of fat is

1 KJ
30 KJ
39 KJ
29 KJ

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Chemistry
Iron and manganese present as pollutants in water cannot be removed by________

Chlorination
Ion exchange process
Lime soda process or manganese zeolite process
Oxidation followed by settling and filtration

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Chemistry
The gas produced in marshy places due to decomposition of vegetation is

Carbon dioxide
Sulphur dioxide
Carbon monoxide
Methane

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