Q3 of 47 Page 1

Oxidation of CH3-CHO is easier than CH3-COCH3. Why?

The oxidation of ketones involves carbon-carbon bond cleavage to afford a mixture of carboxylic acids having lesser number of carbon atoms than the parent ketone.


Moreover, the aldehydes are more reactive than ketones because two alkyl groups reduce the electrophilicity of the carbonyl carbon more effectively than in former.


Due to these reasons, oxidation of CH3-CHO is easier than CH3-COCH3.


More from this chapter

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27

(a) Give IUPAC name of CH3 – CH = CH – CHO.

(b) How can you distinguish between ethanol and ethanal ?


(c) How will you convert the following :


(i) Toluene to benzoic acid


(ii) Ethanol to propan-2-ol


(iii) Propanal to 2-hydroxypropanoic acid


OR


(a) Give IUPAC name of Salicylic acid.


(b) Chloroacetic acid is more acidic than acetic acid. Why ?


(c) Write the products formed when (CH3)3C–CHO reacts with the following :


(i) Zinc amalgam and dilute hydrochloric acid


(ii) Concentrated sodium hydroxide solution


(iii) Semicarbazide and a weak acid


 1

A cube solid is made up of two elements A and B. The elements of A forms hcp while atoms of element B occupy two-third of the octahedral voids. What is the formula of the solid?

 4

Write the IUPAC name of the following compound:


 6

What happens when

(a) XeF2 is hydrolysed?


(b) SO2 is passed into aqueous solution of Fe3+ salt?