The product of following reaction is 2CH₃MgBr + CH₂O →

CH₃OH
C₂H₅OH
CH₄
C₂H₆

Solution

2CH₃MgBr + HCHO → CH₃CH₂OH + Mg (OH) Br

The cyanohydr in of a compound on hydrolysis gives an optically active α-hydroxy acid. The compound is

diethyl ketone
formaldehyde
acetaldehyde
acetone

Solution

Which one of the following esters cannot undergo Claisenself-condensation?

CH₃CH₃CH₃CH₃-COOC₂H₅
C₆H₅COOC₂H₅
C₆H₅CH₂COOC₂H₅
C₆H₁₁CH₂COOC₂H₅

Solution

The ester having α-hydrogen atom show Claisen condensation reaction.

We know that ethyl benzoate (C₆H₅COOC₂H₅) does notcontain α-hydrogen. Therefore C₆H₅COOC₂H₅ does not undergo Claisen self condensation.

The compound which is not formed during the dry distillation of a mixture of calcium formate and calcium acetate is

methanal
propanal
propanone
ethanal

Solution

Propanal is not formed during the dry distillation of amixture of calcium formate and calcium acetate. While methanal, propanone and ethanal are formed as follows:

In the Friedel Craft’s acylation reaction, the effective electrophile is

RCOCl⊕
AlCl₃
RCOCl
RCO⊕

Solution

An ester is boiled with KOH. The product is cooled and acidified with concentrated HCl. A white crystalline acid separates. The ester is

methyl acetate
ethyl acetate
ethyl formate
ethyl benzoate

Solution

Which of the following products is formed when benzaldehyde is treated with CH₃MgBr and the addition product so obtained is subjected to acid hydrolysis ?

A secondary alcohol
A primary alcohol
Phenol
tert-Butyl alcohol

Solution

Aldehydes, other than formaldehyde, when treated with RMgX give 2º alcohols.

Schotten-Baumann reaction is a reaction of phenols with

benzoyl chloride and sodium hydroxide
acetyl chloride and sodium hydroxide
salicylic acid and conc. H₂SO₄
acetyl chloride and conc H₂SO₄

Solution

The function of NaOH is

(i) To convertphenol to more stronger nucleophile PhO^-

(ii) To neutralize the acid formed

Formic acid is obtained when

calcium acetate is heated with conc.H₂SO₄
calcium formate is heated with calcium acetate
glycerol is heated with oxalic acid at 373 K
acetaldehyde is oxidised with K₂Cr₂O₇ and H₂SO₄

Solution

When glycerol is heated with oxalic acid following reaction occurs.

Among acetic acid, phenol and n-hexanol, which of the following compounds will react with NaHCO₃ solution to give sodium salt and carbon dioxide ?

acetic acid
n-Hexanol
acetic acid and phenol
phenol

Solution

among acetic acid, phenol and n-hexanol only CH₃COOH reacts with NaHCO₃ to evolve CO₂ gas.

CH₃COOH + NaHCO₃ → CH₃COONa + CO₂ + H
₂O

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