How many of the following reagents on reacting with Acetylene.
(I) Na , (II) ammoniacal `AgNO_3`, (III) HCI , (IV) NaOH

Answer

3

Explanation

d) `CH -= CH + Na to CH -= C^(-) Na^(+) + (1)/(2) H_2`
`CH-= underset("(Ammonical)")(CH + AgNO_3)to underset ("White ppt.")(CH -= C^(-) Ag^(+))`
`CH -= CH + NaOH to CH_3 = CH - Cl`
Usually occurs in the presence of `Hg^(2+)`
`CH = CH + NaOH to `no reaction . Because of hard acid, hard based and soft acid , soft base (HASB) thepry. But is reacts wiht `NaNH_2`.
`CH -= CH + NaNH_2 to CH -= C^(-) Na^(+)` Feasible