A Chloro compound (A) showed the following properties:
(a) decolourised bromine water (b) absorbed hydrogen catalytically (C) gives precipitate with cuprous chloride, (d) when vaporized 1.49 g of (A) gave 448 mL of vapours at STP. Identify (A) and write down the reactions involved.

Explanation

First two properties indicate the compound is unsaturated. The third shows that the compound has =CH grouping.
`" Molecular mass "=(22400xx 1.49)/(448) =74.5`
Let the formula of the compound be `RCIC-=CH` i.e.,
`R+35.5 +25=74.5`
`R=14(CH_(2))`
The compound is `underset(CI)underset(|)CH_(2)-C-=CH`(3-Chloropropyne)