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Q.

Which of the following group reagent is preferred to give vinegar-like odour on warming?

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a

$dil. H_{2} {SO}_{4}$

b

$(conc. H_{2} {SO}_{4} + C_{2} H_{5} OH)$

c

$conc. {HNO}_{3}$

d

$conc. H_{2} {SO}_{4}$

answer is A.

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Detailed Solution

Dilute sulfuric acid reagent gives vinegar-like odour on warming.

Diluted sulfuric acid is strongly ionised and releases a significant amount of heat during dilution due to the hydration of the hydrogen ions. The majority of the characteristics of typical strong acids are present in the dilute acid. It turns blue litmus red. Acetate ions are present if the salt smells like vinegar after being treated with dilute sulpuric acid.

Hence, correct option is A.

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