Chemistry - STEREO ISOMERISM Question with Solution | TestHub

(I) Allene derivative is chiral because both terminal carbon atoms have different substituents and the molecule possesses axial chirality.

(II) The substituted cyclohexane is chiral. Due to the arrangement of Cl, Br and OH groups, no plane of symmetry is present.

(III) This is 2-butanol. The carbon bearing –OH is attached to four different groups (H, OH, CH₃ and C₂H₅), so it is chiral.

(IV) Tartaric acid structure shown has an internal plane of symmetry (meso form), hence it is achiral.

(V), (VI), (VII), (VIII), (IX) possess either symmetry elements or no stereogenic center, therefore they are achiral.

Hence, chiral species are (I), (II) and (III).

Total number of chiral molecules/species = 3