Question

Compare bond length of C-H bond.
$\underset{H}{\underset{a|}{C}}{H}_2-\underset{H}{\underset{b|}{C}}H=\stackrel{\oplus }{C{H}_2}$.

• A. a $=$ b
• B. a $>$ b
• C. a $<$ b
• D. None

Answer 1

Answer: (A)

a $=$ b

Both bonds are between ${}^{\prime }{C}^{\prime }$ and ${}^{\prime }{H}^{\prime }$. The double bond and positive charge on first carbon doesn't influence the length of ${}^{\prime }{C}^{\prime }$ and ${}^{\prime }{H}^{\prime }$ bond. So, they are equal $\Rightarrow a=b$