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With the help of the following equation ...

With the help of the following equation and data choose the wrong statement .
I. `E_(act) = + 435.1 kJ`
II. `E_(act) = + 410.0 kJ`
III. `E_(act) = + 368.0 kJ`
IV. `E_(act) = + 343.0 kJ`
V. `E_(act) = 355.6 kJ`

A

(a) Thermal creaking of (C--H) bond of methane occurs at 1500 K and that of (C--H) bond of ethen break at 800 - 900 K.

B

(b) during homolysis of ethane at high temperature, the (C--C) bond breaks more radily than (C--H) bonds.

C

(c) During the cracking of n-butane, reaction (IV) occurs more readily than reaction (V).

D

(d) Formation of `CH_(3) C^(.)H_(2)` radical by reaction (II) will take place at lower temperature than the formation of `C^(.)_(2)H_(5)` radical by reaction (IV).

Text Solution

Verified by Experts

The correct Answer is:
D
Lower the `E_(act)` of first step of chain propagatiopn reaction, more easily the bond can be broken. Also this bond breaking will take place comparatively at a lower temperature.
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