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Standard XII
Chemistry
Amorphous Forms of Carbon
I. Benzene C ...
Question
I. Benzene
C
6
H
6
II. Borazine
B
3
N
3
H
6
Select the correct statement regarding I and II.
A
C
−
H
bond length in I is identical with
N
−
H
and
B
−
H
bond lengths in II
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B
The nature of the double bond is perfectly identical in both
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C
Both molecules are planar
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D
I is non planar and II is planar
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Solution
The correct option is
C
Both molecules are planar
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2
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Q.
(I) (II)
H - N - - -N - - -N
In hydrogen azide, the bond orders of bonds (I) and (II) are:
Q.
C
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has four identical
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Q.
Read the following carefully to mark the correct option out of the options given below:
Statement I:
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Statement II: Silicon forms double bonds with itself.
Q.
(A) : The C, C bond length in benzene is intermediate between C, C single bond length and C, C double bond length.
(R) : Benzene molecule exhibits resonance.
Q.
Which of the following statements are correct?
(I) Both melting and boiling points of
H
2
O
are higher than those of
H
2
T
e
.
(II) In both
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5
and
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O
4
all
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−
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(III) In both crystalline
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and
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.
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forms only dimeric anion through hydrogen bond.
(IV)
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on further ionization (removal of single electron) form thermodynamically less stable species.
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