Arrange the following compounds in the increasing order of their property as indicated:
i. Acetaldehyde, acetone, di-tert-butyl ketone, methyl tert-butyl ketone (reactivity towards HCN).
ii. `CH_(3)CH_(2)CH(Br)COOH, CH_(3)CH(Br)CH_(2)COOH, (CH_(3))_(2)CHCOOH, CH_(3)CH_(2)CH_(2)COOH` (acidic strength).
iii. Benzoic acid, 4-nitrobenzoic acid, 3,4-dinitro-benzoic acid, 4-methoxybenzoic acid (acidic strength).