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Chemistry

Chemistry
Commercial Vaseline is derived from

Plant gums
Coal tar
Petroleum
Wool wax

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

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

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Chemistry
Smoke is formed due to

Gas dispresed in solid
Gas dispersed in gas
Solid dispresed in liquid
Solid dispersed in gas

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Chemistry
Which one of the following is not present in cement ?

Alum
Gypsum
Alumina
Clay

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Chemistry
Which one is a soluble salt in H2O

Zn(OH)2
CuS
PbCl2
CaCl2

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Chemistry
Which one of the following minerals is found in pure form?

Iron
Manganese
Copper
Bauxite

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