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CHEMISTRY

Chemistry
'All the four quantum numbers of two electrons in an atom are not the same.' It is the law of –

Uncertainty Principle of Hiesenberg
Hund's rule of maximum multiplicity
Exclusion Principle of Pauli
Avogadro's Law

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Chemistry
Which of the following is not a donor atom?

Antimony
Phosphorus
Arsenic
Aluminium

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Chemistry
What happens when a chemical bond is formed ?

More energy is released than is absorbed
Energy is neither released nor absorbed
Energy is always absorbed
Energy in always released

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Chemistry
Mark the compound which possess ionic, covalent and coordinate bonds.

NH4Cl
SO3
SO2
H2O

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Chemistry
In ice, the number of hydrogen bonds per water molecule is

2
1
8
4

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