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Give chemical tests to distinguish betwe...

Give chemical tests to distinguish between
(i) Propanal and propanone
(ii) Benzaldehyde and acetophenone
(b) Arrange the following compounds in an increasing order of their property as indicated :
(i) Acetaldehyde, Acetone , Methyl tert-butyl ketone (reactivity towards HCN)
(ii) Benzoic acid ,3,4-Dinitrobenzoic acid , 4-Metthoxybenzoic acid (acid strength)
(iii) `CH_(3)CH_(2)CH(Br)(COOH), CH_(3)CH(Br)CH_(2)COOH, (CH_(3))_(2)CH COOH` (acid strength)

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