CaC2H2O−−→ACu2Cl2−−−−−→NH4OHB. Incorrect statement is
Pure form of 'A' has garlic smell
'B' is used as a test to identify 'A'
'B' is red precipitate
'B' is a pale yellow gas
Garlic smell is due to impurities in acetylene like PH3+H2S B is a reddish brown precipitate of Cu2C2.