CLASS XII CHEMISTRY (HALOALKANES AND HALOARENES)

Front

Which alkyl halide has the highest reactivity for a particular alkyl group? Options: R-F, R-Cl, R-I, R-Br

Back

R-I

Front

Order of increasing S₁N reactivity for alkyl halides: CH3-X, (CH3)2CH-X, (CH3)3C-X, (CH3)3C-CH2-X

Back

(CH3)3C-X > (CH3)2CH-X > (CH3)3C-CH2-X > CH3-X

Front

Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is

Back

Electrophilic substitution reaction

Front

Which is the correct increasing order of boiling points of the following compounds?
Options:
Bromobenzene < 1-Bromobutane < 1-Bromopropane < 1-Bromoethane
Bromobenzene < 1-Bromoethane < 1-Bromopropane < 1-Bromobutane
1-Bromopropane < 1-Bromobutane < 1-Bromoethane < Bromobenzene
1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene

Back

1-Bromoethane < 1-Bromopropane < 1-Bromobutane < Bromobenzene

Front

Which reagent will you use for the following reaction?
CH₃CH₂CH₂CH₃ → CH₃CH₂CH₂CH₂Cl + CH₃CH₂CHClCH₃
Options: Cl₂ /UV light, NaCl + H₂SO₄, Cl₂ gas in dark, Cl₂ gas in the presence of iron in dark

Back

Cl₂ /UV light

Front

Which of the following is not the method of preparation of alkyl halide? Options: Darzen’s method, Halogenation of alkene, Addition of HX on alkenes, Hydration of alkene

Back

Hydration of alkene

Front

Back

POCl3

Front

Back

SOCl2

Front

When excess chlorine is used in electrophilic substitution of toluene, which dichloroarenes are formed?

Back

Ortho and para

Front

Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism? Options: Ethyl chloride, Isopropyl chloride, Choro benzene, Benzyl chloride

Back

Benzyl chloride