The bond lengths (in pm ) of C - C , C ≡ C and C = C are:

C - C C ≡ C C = C 154 120 133

C - C C ≡ C C = C 120 154 133

C - C C ≡ C C = C 154 120 139

C - C C ≡ C C = C 140 133 139

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The bond order of the N−O bonds in $N O_{3}^{-}$ ion is

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Important Questions on Chemical Bonding and Molecular Structure

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Maximum bond angle at nitrogen is present in which of the following?

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The compound that has the largest

H - M - H

bond angle

(M = N, O, S, C)

, is :

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How many ions of the following have a bond order of $2.5 ?$

$N_{2}^{-}; {NO}^{-}; C_{2}^{-}; N_{2}^{+}; C_{2}^{2 -}; {CN}^{+}$

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In which of the following the

C - H

bond distance is the longest?

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If enthalpy of atomization for

B r_{2} (l)

x k J / m o l

and bond enthalpy for

B r_{2}

y k J / m o l

, the relation between them

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The bond lengths (in $pm)$ of $C - C, C \equiv C$ and $C = C$ are:

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Average bond enthalpy of water is

464 \cdot 5 kJ {mol}^{- 1}

. If the energy required to break first

O - H

bond is

502 kJ {mol}^{- 1}

, how much energy per mol is required to break second

O - H

bond ?

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Which of the following molecules has shortest

C - C

bond length?

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The number of

π

-bonds and

σ

-bonds present in naphthalene are respectively

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The correct order of

C - O

bond length is:

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Among the following species, the

H - X - H

angle (

X = B, N

P

) follows the order.

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Arrange the following compounds in increasing order of

C - O H

bond length: methanol, phenol,

p

-ethoxyphenol

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Pick the INCORRECT statement among those given below

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Bond lengths (in

pm

) of

C - H, C - C, C = C

and

C \equiv C

bonds, respectively are:

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The correct order of bond dissociation enthalpy of halogens is:

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There are two statements, one labelled as Assertion
(A) and the other as Reason (R). Examine both the statements carefully and mark the correct choice.
(A) The

O - H

bond angle in

H_{2} O

is greater than

S - H

bond angle in

H_{2} S .

(R) Due to larger size of

S

, hydrogen bonding does not occur in

H_{2} S .

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Which of the following compounds has highest

C - X

bond strength?

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The intermolecular potential energy for the molecules

A

B

C

and

D

given below suggests that:
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The number of bonds between sulphur and oxygen atoms in

S_{2} O_{8}^{2 -}

and the number of bonds between sulphur and sulphur atoms in rhombic sulphur, respectively are:

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Among the following molecules, the one with the largest bond angle at the central atom is

The bond order of the N−O bonds in NO3- ion is

Important Questions on Chemical Bonding and Molecular Structure

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The bond order of the N−O bonds in $N O_{3}^{-}$ ion is