The Substitution reaction of alkyl halide mainly occurs by SN1 & SN2 mechanism. Whatever mechanism alkyl halide follow for the substitution reaction to occur, the polarity of the carbon halogen bond is responsible for these substitution reactions. The rate of SN1 reactions are governed by the stability of carbocation whereas the rate of SN2 reactions is decided by steric factors if the starting material is a chiral compound we may end up with an inverted product or racemic mixture depending upon the type of reaction mixture followed by the alkyl halide.
i. Racemisation occurs in
a). SN1 reaction
b). SN2 reaction
c). both SN1 & SN2 reactions
d). neither SN1 nor SN2 reactions
ii. If an optically active alkyl halide undergoes substitution reaction by SN1 mechanism, which one not happens:
a). Formation of racemic mixture
b). Formation of inverted product
c). formation of carbocation
d). formation of transition state
iii. The SN1 reaction of optically active alkyl halides lead to
a). retention of configuration
b). racemisation
c). inversion of configuration
d). none of above
iv. For which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism
a). ethyl chloride
b). Isopropyl chloride
c). chlorobenzene
d). benzyl chloride
v. ASSERTION- When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.
REASON- Diffusion of solvent occurs from a region of high concentration solution to a region of low concentration solution.
a. Both assertion and reason are true, and reason is the correct explanation of assertion.
b. Both assertion and reason are true, but reason is not the correct explanation of assertion.
c. Assertion is true but reason is false.
d. Both assertion and reason are false.
