Question

One mole of $1$,$2$-dibromopropane on treatment with $X$ moles of $NaNH_2$ followed by treatment with ethyl bromide gave a $2$-pentyne. The value of $X$ is

• A. one
• B. two
• C. three
• D. four

Answer 1

Answer: (C)

three

Answer 2

Total number of moles of $NaNH_2 = 2 + 1 = 3$