Which of the following reagent (s) gives the reaction below (A) H_2SO_4 (B) NBS

Question

Which of the following reagent (s) gives the reaction below (A) H_2SO_4 (B) NBS (C) H_2 (D) NaBH_4/H_3O^- (E) LiAIH_4/H_3O^- Product of the following reaction is: (A) methylbenzene (B) benzoic acd (C) benzyl alcohol (D methylbenzoate (E) phenylacetate IUPAC name of the compound (A) ethyl propionate (B) ethyl ethanoate (C) 3-methylpropionate (D) 3-ethylpropionate (E) 4-ethylpropionate IUPAC name of the compound (A) 3-ethylcyclohexane (B) 3-ethylcyclohexanol (C) 3-ethylhexanone (D) 3-ethyleyclohexanone (E) ethylpropanone General formula of Gilman reagent is: (A) RMgX (B) R_2MgLi (C) R_2CuLi (E) RCuLi Reaction of 2-pentanol with Pyridinium chlorochromate (PCC) gives: (A) 2-pentanoic acid (B) 2-pentanone (C) 2-penanal (D) pentane (E) pentanoic acid Product of the reaction between cyclopentanone and 1,2-ethanediol in the presence of acid catalyst is: Which of the following reagent (s) can be used to convert CH_3CH_2COCH_3 to n-butane? (A) HCN (B) NH_3 (C) H_2NNH_2/KOH (D) Ph-NH_2 (E) NaCN Product of the reaction between 2-cyclohexenone and diethylcopper (I) lithium is: Wolf-Kishner reduction (H_2N-NH_2, KOH, heat) of 2,3-dimethyl cyclohexanone gives: (A) 2,3-dimethylcyclohexane (B) 2, 3- dimethylcyclohexanol (C) 2,3 - dimethylhexene (D) 2,3-dimethylcyclohexanone hydrazone (E) 2,3-dimethylcyclohexanal Conversion of benzyl alcohol to benzoic acid is a (A) reduction (B) oxidation (C) dehydration (D) nucleophilic addition (E) elimination

Explanation / Answer

Ans 1 .E. LiAlH4/ H3O+

The alcohol butanol can be synthesised from the ester butyl butanoate by hydrolysis in the presence of strong reducing agent lithium aluminium hydride.

It is very expensive reagent so commercially hydrogenation of ester is done in the presence of a catalyst to yield alcohol.

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