Question

Ô Nikogen
has
higher
loni
ication that to
e of
oxygen give
reason .​

Answer 1

Answer:

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Explanation:

Q1

Assertion (A): Though the central atom of both NH

3

and H

2

O molecules are sp

3

C hybridized,

yet H-N-H bond angle is greater than that of H-O-H.

Reason (R): This is because nitrogen atom has a lone pair and oxygen atom has two lone pairs.

Q2

Give reasons in one or two sentences for the following:

p-Dichlorobenzene has a higher melting point than o- and m-isomers but the boiling points of these isomers are nearly the same.

Q3

Give reasons for the following:

(a) Oxygen has lower ionisation energy than that of nitrogen.

(b) Electron gain enthalpy of chlorine is more negative than that of fluorine.

(c) Arrange O

2−

, Al

3+

, Na

+

,F

−

and Mg

2+

in the increasing order of their sizes.

Answer 2

Answer:

An atom is highly stable when its valence orbital is completely filled or half-filled and in nitrogen, the valence p orbital is exactly half filled. So, the ionization energy of nitrogen is more than that of oxygen.

Hope it helps you.. :)

Explanation: