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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 –

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

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Chemistry
Which of the following is not a donor atom?

Aluminium
Phosphorus
Antimony
Arsenic

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Chemistry
What happens when a chemical bond is formed ?

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

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

SO3
H2O
NH4Cl
SO2

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

4
2
1
8

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