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Chemistry

Chemistry
White coal is

Uranium
Hydro-electricity
Diamond
None of these

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Chemistry
Which substance is used to retard the setting action of cement?

Na2O + K2O
CaO
CaSO4, 2H2O
Al2O3

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Chemistry
Epsom salt is used

In making tooth paste
In softening water
In paper industry
As purgative

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Chemistry
Rock salt is a mineral containing

Iron
Magnesium
Sodium
Potassium

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Chemistry
________ gives hardness to stainless steel.

Tin
Lead
Zinc
Carbon

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Chemistry
Which is not an anasthetic agent in surgical operations?

Chloroform
Nitrous oxide
Ether
Acetone

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