Given, 448 mL of A gives 1.53 g of vapours. ∴22400mL of A gives =
1.53
445
×22400=76.50g of A ∴ Molecular mass is 76.5 ∴ The possible compound is CH3−CH=CH−Cl On ozonolysis followed by hydrolysis, it gives aldehyde as follows.
The compound ( A)CH3−CH=CH−Cl (chloropropene) has 3 carbon atoms.