Haloalkanes and haloarenes class 12 chemistry important questions for cbse examination
C lass 12 chapter 10 cbse important questions 1. Out of chlorobenzene and cyclohexyl chloride which one is more reactive towards nucleophilic substitution reaction and why ? CBSE 2019 Answer : it is due to resonance the c-cl bond in chlorobenzene having partial double bond character which makes the substitution of chlorine more difficult in chlorobenzene than in cyclohexyl chloride where the c-cl bond has pure single bond character . 2. Why is t-butyl bromide more reactive towards sn1 reaction as compare to n-butyl bromide ?cbse 19 answer : due to higher stability of tertiary carbocation then n-butyl bromide 3. why chloroform is stored in dark coloured bottles completely filled so that air is kept out ? CBSE 2110 Answer: because chloroform is slowly oxides by air and formed poisonous gas phosgene 2CHCl3 +O2 >>...