Question -
Answer -
(a)┬а2, 2, 4тАУtrimethylpentane
Condensed formula:
(CH3)2CHCH2C┬а(CH3)3
Bond line formula:

(b)┬а2тАУhydroxyтАУ1, 2,3тАУpropanetricarboxylic acid
Condensed Formula:
(COOH)CH2C(OH)(COOH)CH2(COOH)
Bond line formula:

The functional groupspresent in the given compound are carboxylic acid (тАУCOOH) and alcoholic (тАУOH)groups.
(c)┬аHexanedial
Condensed Formula:
(CHO) (CH2)4┬а(CHO)
Bond line Formula:

The functional grouppresent in the given compound is aldehyde
(тАУCHO).