Assertion: Neoprene can be further hardened by heating in presence of sulphur.
Reason: Neoprene contains allylic double bonds which help in introducing sulphur bridges between different polymer chains.
Assertion: Deoxyribose, C5H10O4 is not a carbohydrate.
Reason: Carbohydrates are hydrates of carbon so compounds which follow Cx(H2O)y formula are carbohydrates.
Assertion: Aniline does not undergo Friedel-Crafts reaction.
Reason: Friedel-Crafts is an electrophilic substitution reaction.
Assertion: In comparison to ethyl chloride it is difficult to carry out nucleophilic substitution on vinyl chloride.
Reason: Vinyl group is electron donating.
Assertion: Phenol forms 2, 4, 6-tribomophenol on treatment with Br2 in carbon disulphide at 273 K.
Reason: Bromine polarises in carbon disulphide.
Assertion: On cooling, the brown colour of nitrogen dioxide disappears.
Reason: On cooling, NO2 undergoes dimerisation resulting in the pairing of odd electrons of NO2.