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Chemistry

Chemistry
Which variety of coal contains recognisable traces of the original plant material ?

Lignite
Bitumen
Anthracite
Peat

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Chemistry
In silvery paints, the main constituent present is

Aluminium powder
Silver powder
White lead
Lead powder

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Chemistry
The element used for making solar cells is

Sodium
Calcium
Silicon
Magnesium

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Chemistry
Coating of solid waste with impervious material is known as

Chemical fixation
Encapsulation
Landfill
Capping

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Chemistry
The absolute temperature of a gas is doubled and the pressure is reduced to half, the volume of the gas

Remains unchanged
Will be doubled
Will increase four-fold
Will be reduced to half

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Chemistry
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

p-electrons in Ne(Z = 10)
p-electrons in CI(Z = 17)
s-electrons in Mg(Z = 12)
d-electrons in Fe(Z = 26)

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