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  • Try this! - The increasing order of the reactivity of the following withis : - Organic Compounds containing Oxygen - JEE Main

The increasing order of the reactivity of the following with LiAIH_{4}is :

  • Option 1)

    (B) < (A) < (D) < (C)

  • Option 2)

    (B) < (A) < (C) < (D)

  • Option 3)

    (A) < (B) < (C) < (D)

  • Option 4)

    (A) < (B) < (D) < (C)

Answers (1)

best_answer

 

Order of reactivity of halogen acids -

HI>HBr>HCl

- wherein

ROR'+HX\rightarrow ROH+R'X

 

 

Anhydride formation from carboxylic acid -

–  Except formic acid, lower monocarboxylic acid on heating with dehydrating agent forms anhydrides.

–  It involves cleavage of  C - OH bond.

- wherein

RCOOH\overset{P_{2}O_{5}}\rightarrow (RCO)_{2}O

 

 ??????

 

Physical properties of carboxylic acids -

–  Boiling point increases with increasing molecular mass due to increase in Van Der Waals force.

–  Solubility decreases with increasing number of carbon atom due to increasing hydrophobic nature of the alkyl chain.

Acidic and basic hydrolysis of Esters -

Acidic hydrolysis gives carboxylic acid directly. Basic hydrolysis gives carboxylates which acidify to give the carboxylic acid.

- wherein

As we have learned in electrophilicity .

Rate of nucleopholic attack on carbonyl \alpha Electrophilicity of carbonyl group

 

 


Option 1)

(B) < (A) < (D) < (C)

Option 2)

(B) < (A) < (C) < (D)

Option 3)

(A) < (B) < (C) < (D)

Option 4)

(A) < (B) < (D) < (C)
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