Arrange benzene,n-hexane and ethyne in decrea | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(D) The decreasing order of acidic behaviour is ethyne $>$ benzene $>$ $n$-hexane. The acidity of a hydrocarbon depends on the $s$-character of the hy

Vedclass · Accepted Answer

Ethyne $>$ Benzene $> n$-hexane

Vedclass · Answer

(D) The decreasing order of acidic behaviour is ethyne $>$ benzene $>$ $n$-hexane. The acidity of a hydrocarbon depends on the $s$-character of the hybridised carbon atom to which the hydrogen is attached. Higher $s$-character leads to higher electronegativity of the carbon atom,which makes the $C-H$ bond more polar and the resulting carbanion more stable. The hybridisation of carbon atoms in these compounds is as follows: Ethyne $(HC \equiv CH)$: $sp$ hybridised ($50\% \ s$-character). Benzene $(C_6H_6)$: $sp^2$ hybridised ($\approx 33.3\% \ s$-character). $n$-Hexane $(CH_3(CH_2)_4CH_3)$: $sp^3$ hybridised ($25\% \ s$-character). Therefore,the order of acidity is ethyne $>$ benzene $>$ $n$-hexane.

Arrange benzene,$n$-hexane and ethyne in decreasing order of their acidic behaviour.

Similar Questions

Give the main product of the following reactions:
$(i)$ $1, 2-$dibromopropane + alcoholic $KOH$
$(ii)$ $1, 1, 2, 2-$tetrabromoethane + zinc powder in methanol

Which of the following gases is poisonous?

What is the acid $(A)$ obtained in the following reaction sequence?
${C_2H_5I}$ $\xrightarrow{\text{alc. KOH}} X$ $\xrightarrow[CCl_4]{Br_2} Y$ $\xrightarrow{KCN} Z$ $\xrightarrow{H_3O^+} A$

Which of the following reactions does not represent the major product correctly?

Which of the following $C-H$ bond has the least bond dissociation energy?

Vedclass Test Series

Exam Paper Generator

Online Exam Module