i. Optically active alkane with lowest molecular weight,
i. `underset(3-"Methyl hexane")(H_(2)C_(2)-underset(CH_(3))underset(|)overset(H)overset(|)(C^(**))-C_(3)H_(7))` and `underset(2,3-"Dimethyl pentane")(H_(5)C_(2)-underset(CH_(3))underset(|)overset(H)overset(|)(C^(**))-underset(H)underset(|)overset(CH_(3))overset(|)(C )-CH_(3))`
ii. Optically active alkene with lowest molecular weight:
`underset(3-"Methyl pentene")(H_(5)C_(2)-underset(CH_(3))underset(|)overset(H)overset(|)(C^(**))-overset(2)CH = overset(1)(CH_(2)))`
iii. Optically active alkyne with lowest molecular weight :
`underset(3-"Methyl pentyne")(H_(5)C_(2)-underset(CH_(3))underset(|)overset(H)overset(|)(C^(**))-C-=CH)`
iv. Optically active unsaturated hydrocarbon with lowest molecular weight:
`underset(3-"Methyl-pent-1-en-4-yne")(H_(2)overset(1)(C)=H overset(2)(C )-underset(CH_(3))underset(|)overset(H)overset(|)(.^(3)C^(**))-overset(4)(C )-=overset(5)(CH))`
v. Optically active alkyl halide with lowest molecular weitht:
`underset(("2-Flurobutane"))(H_(3)C-underset(C_(2)H_(5))underset(|)overset(H)overset(|)(C^(**))-F)`
vi. Optically active alcohol with lowest molecular weight:
`underset(("Butan-2-ol"))(H_(3)C-underset(C_(2)H_(5))underset(|)overset(H)overset(|)(C^(**))-OH)`
vii. Optically active acid with lowest molecular weight:
`underset(("2-Methyl butanoic acid"))(H_(3)C-underset(C_(2)H_(5))underset(|)overset(H)overset(|)(C^(**))-COOH)`
viii. Optically active amine with lowest molecular weight:
`underset(("Butan-2-amine"))(H_(3)overset(1)(C)-underset(.^(4)C_(2)H_(5))underset(|)overset(H)overset(|)(.^(2)C^(**))-NH_(2))`