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Chemistry

Chemistry
Gold dissolves in

Nitric acid
Hydrochloric acid
Acetic acid
Aqua-regia

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Chemistry
Except mercury which is the other metal that is liquid at standard conditions for temperature and pressure

Bromine
Magnesium
Lead
Barium

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Chemistry
Percentage of carbon in steel ranges from

0.1 to 1.5
3.0 to 4.0
1.5 to 3.0
4.0 to 6.0

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Chemistry
Ozone layer in the upper parts of the atmosphere serves as a protective shield against harmful

SO2 in the air
Solar ultraviolet radiation
Solar infrared radiation
CO2 in the air

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Chemistry
Cement is formed by strongly heating a mixture of

Limestone and graphite
Clay and graphite
Limestone and clay
Chalk and graphite

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Chemistry
When water itself combines chemically with some element or mineral it is called

Hydration
Oxidation
Desilication
Carbonation

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MORE MCQ ON Chemistry

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