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(a) Write the products of the following ...

(a) Write the products of the following reactions :

(ii) `CH_(3)MgBr+CO_(2)underset(H_(3)O^(+))overset("Dry ether")rarr`
(iii) `CH_(3)CH_(2)COOH + Br_(2) overset("Red Phosphorus")rarr`
(b) Write simple chemical tests to distinguish between the following pairs of compounds :
(i) Propanal and propanone (ii) Benzaldehyde and Benzoic acid

Text Solution

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(b) (i) Propanal and Propanone
Tollen's reagent test
Propanal being aldehyde reduces Tollen's reagent but propanone being a ketone does not
`underset("Propanal")(CH_(3)CH_(2))CHO+2underset("regent")underset("Tollen's")([Ag(NH_(3))_(2)])^(+)+3OH^(-)rarr underset("ion")underset("Propanoate")(CH_(3)CH_(2)COO^(-))+underset("mirro)")underset("(Silver")(2Agdarr)+4NH_(3)+2H_(2)O`
`underset("Propanal")(CH_(3)COCH_(3))overset("Tollen's reagent")rarr"No silver mirror"`
(ii) Benzaldehyde and Benzoid acid
`NaHCO_(3)` test

It produces brisk effervescence due to evolution of `CO_(2)`.
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