How will you obtain following compound from benzaldehyde : (Give equation only) Benzoyl chloride

The aldehyde group present in benzaldehyde is electron withdrawing. Therefore, it attracts electrons away from the ring. Thus, it deactivates the ring towards electrophilic reagents. Benzaldehyde undergoes halogenation in the absence of catalyst to form benzoyl chloride, whereas in the presence of FeCl 3 it gives m-chloro benzaldehyde.

Write the chemical equations for the following reaction: Haloform reaction

Aldehydes and ketones group reacts with halogens in the presence of sodium hydroxide or sodium hypohalite to form haloform and salt of carboxylic acid having one carbon less than the carbonyl compound. The equation for the chemical reaction is: CH 3 COCH 3 → NaOCl CHCl 3 + CH 3 COONa

Write the chemical equations for the following reactions: Stephen reaction

Alkyl nitriles on reduction with stannous chloride and hydrochloric acid in dry ether give corresponding imine hydrochlorides which on acid hydrolysis, give corresponding aldehydes. This reaction is known as Stephen's reaction. The equation for the chemical reaction is R - C ≡ N + SnCl 2 + HCl → R - C = N - H → H 3 O + R - CHO + NH 3

What happens when reduction of ethanal takes place by Na - Hg / H 2 O

Sodium amalgam in water behaves as a reducing agent. It reduces aldehydes compounds to primary alcohols. Ethanal reacts with sodium amalgam in the presence of water to form ethanol. The equation for the chemical reaction is: CH 3 - CHO → Na - Hg / H 2 O CH 3 - CH 2 - OH

What happens when reduction of ethanal takes place by LiAlH 4 ?

Ethanal undergoes reduction process in the presence of lithium aluminium hydride to form primary alcohols. Lithium aluminium hydride is a strong reducing agent, and it reduces aldehydes, ketones to alcohols. The equation for the chemical reaction is: CH 3 CHO → LiAlH 4 CH 3 CH 2 - OH

What happens when reduction of ethanal takes place by wulf kishner reaction?

Wolff kishner reduction is a chemical reaction in which aldehydes and ketones are converted into an alkane in presence of hydrazine, base and thermal conditions. When aldehydes are heated with hydrazine and potassium hydroxide in ethylene glycol, it results in the formation of alkanes. The equation for the reaction is: CH 3 - CHO → KOH , - H 2 O NH 2 - NH 2 C 2 H 6 + N 2

What happens when reduction of ethanal takes place by clemmensen reaction?

The Clemmensen reduction is an organic reaction used to reduce an aldehyde or ketone to an alkane. Ethanal undergoes reduction process in the presence of zinc and hydrochloric acid to form ethane. The equation for the chemical reaction is: CH 3 CHO → Conc . HCl Zn - Hg CH 3 - CH 3

Write silver mirror test for identification of aldehyde.

Silver mirror test is used to distinguish aldehydes from ketones. Aldehydes give positive silver mirror test. Ketones do not give this test. In this test, Tollens reagent is used which is ammoniacal silver nitrate solution. It acts as mild oxidising agent and oxidises aldehyde to acetate ion. Silver ion is reduced to metallic silver. This forms a bright silver mirror on the inner side of the container, or it forms greyish black precipitate. The equation for the reaction is: R - CHO + 2 Ag NH 3 2 + + 3 OH - → ∆ R - COO - + 2 Ag + 2 H 2 O + 2 NH 3

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Madhya Pradesh Board-2020>Q 15

EASY

12th Madhya Pradesh Board

IMPORTANT

Earn 100

Explain following reaction: Etard reaction

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