Reaction by which Benzaldehyde cannot be prepared:

  • Option 1)

    + Zn/Hg and conc.HCI

  • Option 2)

    + CrO2CI in CS2 followed by H3O+

  • Option 3)

    + H2 in presence of Pd-BaSO4

  • Option 4)

    + CO + HCI in presence of anhydrous A1CI3

 

Answers (1)

As we learnt in

Gattermann koch reaction -

(CO+HCl)   can function as formyl chloride for the introduction of a formyl group  (-CHO)

- wherein

 

 

Etard reaction -

chromyl chloride oxidises methyl group to a chromium complex.

- wherein

 

 

Reductive Ozonolysis of alkenes -

In the presence of Zn dust and H2O gives aldehyde.

- wherein

RCH=CHR+O_{3}\rightarrow 2RCHO+H_{2}O_{2}

 

 

 

 

 


Option 1)

+ Zn/Hg and conc.HCI

Correct

Option 2)

+ CrO2CI in CS2 followed by H3O+

Incorrect

Option 3)

+ H2 in presence of Pd-BaSO4

Incorrect

Option 4)

+ CO + HCI in presence of anhydrous A1CI3

Incorrect

Preparation Products

JEE Main Rank Booster 2021

This course will help student to be better prepared and study in the right direction for JEE Main..

₹ 13999/- ₹ 9999/-
Buy Now
Knockout JEE Main April 2021 (Subscription)

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 4999/-
Buy Now
Knockout JEE Main April 2021

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 22999/- ₹ 14999/-
Buy Now
Knockout JEE Main April 2022

An exhaustive E-learning program for the complete preparation of JEE Main..

₹ 34999/- ₹ 24999/-
Buy Now
Knockout BITSAT 2021

It is an exhaustive preparation module made exclusively for cracking BITSAT..

₹ 4999/- ₹ 2999/-
Buy Now
Exams
Articles
Questions