Question

Consider the following statements about benzene:

I : Heats of hydrogenation of benzene and 1, 3, 5-cyclohexatriene are identical.

II : Benzene is much more stable than expected for 1, 3, 5-cyclohexatriene.

III : All carbon-carbon bonds (single and double) have equal length.

Select correct statements:

Options

• I, II

• II, III

• I, III

• I, II, III

Answer 1

II, III

Explanation:

Benzene is actual molecule and cyclohexa 1, 3, 5 triene is hypothetical molecule so benzene is stabilize by resonance whereas cyclohexa 1, 3, 5 triene have alternate double and single bond length of carbon – carbon.