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Chemistry

Chemistry
Bauxite is an alloy of which of the following metals ?

Silver
Tin
Aluminium
Iron

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Chemistry
Greenhouse effect is caused by

Nitrogen
Carbon dioxide
Carbon monoxide
Nitrogen dioxide

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

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

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Chemistry
Which of the following is used to increase the anti-knocking property of petrol ?

Tetramethyl lead
Trimethyl lead
Tetraethyl lead
Triethyl lead

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Chemistry
Ethylene is a ________ molecule.

Ionic
Nonpolar
Polar
Covalent

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Chemistry
Iodine can be separated from a mixture of Iodine and Potassium Chloride by

Sublimation
Filtration
Distillation
Sedimentation

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