General
✓✗In the free radical chlorination of propane, 2-chloropropane is the major product even though propane has only 2 secondary H atoms and 6 primary H atoms, because
- primary H atoms do not react at all
- chlorine attacks only carbon
- the reaction is an SN1 reaction
- the secondary radical is more stable, so secondary H atoms are abstracted faster
General
✓✗Which of the following is an optically active compound?
- Heptan-4-ol
- Propan-1-ol
- 2-Chlorobutane
- Butan-1-ol
General
✓✗The difference between the Sandmeyer and Gattermann reactions is that the Gattermann reaction uses
- copper powder with HX instead of cuprous halide
- iodide ions instead of copper
- a free radical initiator
- sunlight instead of a catalyst
General
✓✗1-Chloro-4-nitrobenzene reacts with aqueous NaOH at about 443 K, followed by acidification, to give
- 4-chlorophenol
- 3-nitrophenol
- 4-nitrophenol
- nitrobenzene
General
✓✗The reactivity of alkyl halides towards the formation of Grignard reagents is
- the same for all
- RBr > RCl > RI
- RI > RBr > RCl
- RCl > RBr > RI
General
✓✗Bromobenzene and bromomethane heated with sodium in dry ether give mainly
- biphenyl
- toluene
- benzene
- ethane
General
✓✗Chlorobenzene reacts with Mg in dry ether to give a compound A, which further reacts with ethanol to give
- phenol
- ethylbenzene
- benzene
- phenyl ethyl ether
General
✓✗Optically active 2-bromooctane reacts with OH− to give octan-2-ol with complete inversion of configuration. The reaction is
- E2
- SE2
- SN1
- SN2
General
✓✗An alkyl halide and a nucleophile react in one step with inversion of configuration. The reaction is
- E1
- SN1
- SN2
- free radical substitution
General
✓✗Isobutyl bromide and sec-butyl bromide are respectively
- 1-bromobutane and 2-bromo-2-methylpropane
- 2-bromo-2-methylpropane and 1-bromobutane
- 2-bromobutane and 1-bromo-2-methylpropane
- 1-bromo-2-methylpropane and 2-bromobutane
General
✓✗The correct order of reactivity towards aqueous NaOH (nucleophilic substitution) is
- all react equally slowly
- 4-nitrochlorobenzene > chlorobenzene > 2,4-dinitrochlorobenzene > 2,4,6-trinitrochlorobenzene
- 2,4,6-trinitrochlorobenzene > 2,4-dinitrochlorobenzene > 4-nitrochlorobenzene > chlorobenzene
- chlorobenzene > 4-nitrochlorobenzene > 2,4-dinitrochlorobenzene > 2,4,6-trinitrochlorobenzene
General
✓✗Which of the following has a β-hydrogen atom?
- CH3CH2Br
- (CH3)3CCH2Br
- C6H5CH2Br
- CH3Br
General
✓✗Which of the following is not chiral?
- 2,3-Dibromopentane
- 2-Hydroxypropanoic acid
- 3-Bromopentane
- Butan-2-ol
General
✓✗Iodobenzene is prepared from benzenediazonium chloride by warming it with
- HI and Zn
- I2/Fe
- potassium iodide (KI)
- Cu2I2/HI only
General
✓✗The number of structural isomers formed on monobromination of methylcyclohexane is
- 3
- 6
- 4
- 5