Permanent hardness of water, due to sulphates of the metal,
can be destroyed by the use of
1 Nitrates
2 Zeolites
3 Sulphontes
4 None of these
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methane is not present in
Explain the Evolution of Science as a discipline in the Medieval Period
1 Answers Mahatma Gandhi University,
Cooking oil can be converted into vegetables ghee by the process of 1 Oxidation 2 Hydrogenation 3 Distillation 4 Crystallization
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The chemical used as a ‘fixer’ in photography is 1 Borax 2 Sodium thiosulphate 3 Sodium sulphate 4 Ammonium persulphate
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