(A) With HI, anisole forms iodobenzene and methyl alcohol.
(R ) `I^(-)` ion will combine with smaller group to avoid steric hindrance.

(A) With HBr, anisole forms bromobenzene and methyl alcohol. (R ) Br^(-) ion will combine with smaller group to avoid steric hindrance.

(A) With HBr, anisole forms bromobenzene and methyl alcohol. (R ) Br^(-) ion will combine with smaller group to avoid steric hindrance.

(A) With excess HI anisole gives a mixture of iodobenzene and methyl iodide (R) The reaction between anisole and HI takes place via SN^2 mechanism.

Assertion (A) : Anisole reacts with HI to give phenol and methyl iodide. Reason (R): The strong C-O bond in anisole does not cleave so methanol is never formed.

Greater is the stability of the substituted ammonium cation, stronger should be the corresponding amine as a base. Thus, the order of basicity of aliphatic amines should be: primary > secondary > tertiary, which is opposite to the inductive effect based order. Secondly, when the alkyl group is small, like- CH_3 group, there is no steric hindrance to H-bonding. In case the alkyl group is bigger than CH_3 group, there will be steric hinderance to H-bonding. Therefore, the change of nature of the alkyl group, e.g.,from- CH_3 to- C_2 H_5 results in change of the order of basic strength. In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices. Assertion (A): Greater is the stability of the substituted ammonium cation, stronger is the corresponding amine as a base. Reason (R): The order of basicity of aliphatic amines is: primary > secondary > tertiary.

(A) Tertiary butyl carbonion is more stable than methyl carbanion. (R) +I effect of the three methyl groups in tertiary butyl carbanion tends to make it more stable than methyl carbanion.

Consider the given reaction for preparation of alkyne. (Fritsch reaction). Anti group will migrate because of less steric hindrance. Rate of reaction when the halide ion:

Assertion (A): 2,6-Dimethyl-4-nitrophenol (I) is more acidic than 3,5-dimethyl-4-nitrophenol (II). Reason (R ): It is due to the steric inhibition of the resonance of (-NO_(2)) group with two (Me) groups in (II).