Question

- The correct order of bond length of C-C, C-N,
C-His
(1) C-H<C-N<C-C
(2) C-C<C-N<C-H
(3) C-C<C-H<C-N
(4 C-N<C-H<C-C​

Answer 1

Answer:

1. C-H < C-N < C-C

Explanation:

Carbon-hydrogen bond has the shortest bond length because of its smaller size and the electronegativity difference between the two atoms. Standard bond length of C-H is 1.09 Å.

The 2nd will be C-N bond as these atoms have high electronetivity differences, the standard bond length of carbon-nitrogen is 1.47 Å.

We place C-C bond on third because both atoms have same electro-negativities, the standard bond length of carbon-carbon is 1.54 Å.

Answer 2

The correct order of bond length of C-C, C-N, C-H is C-H<C-N<C-C.

Explanation:

• The distance between nuclei of two bonded atom in a molecule is called bond length.
• It is usually expressed in Angstrom.
• When a bond is formed by more number of electrons, it is short and bond formed with less electrons is long.
• The bond length of C-C, C-N and C-H are 1.54, 1.47 and 1.09 respectively.
• When this value is arranged increasing order, we get 1.09 < 1.47 < 1.54.
• Thus it can be inferred that option 1 with C-H < C-N < C-C is correct order of bond length.

Learn more about bond length

The bond length of Cl2 molecule is

a) 0.74

b) 1.44

c) 1.98

d) 2.28

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