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Chemistry

Chemistry
The coordination number of body centered atom in cubic structure is

6
8
10
4

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

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

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Chemistry
The most abundant constituent of atmospheric air is :

Oxygen
Carbon
Nitrogen
Hydrogen

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Chemistry
What is the chemical symbol of mercury

Hg
Mg
None of these
Mr

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Chemistry
The smog is essentially caused by the presence of

O3 and N2
O2 and O3
Oxides of N and S
O2 and N2

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Chemistry
What is a mixture of potassium nitrate, powdered charcoal and sulphur called?

Gun powder
Glass
Paint
Cement

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MORE MCQ ON Chemistry

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