Which of the following is correct? (i) The smallest alkene which can show optical isomerism possesses 7 carbon atoms (ii) The smallest alkanes which can exist in the enantiomertic forms are -2-methy1lexane and 2,3-dimethy 1pentane (iii) The smallest alkane which has a meso steroisomer possesses 6 carbons (iv) 3,4-Dimethy1lexane has a mseo steroisomer.

Which of the following is correct? (i) The smallest alkene which can

1.	Which of the following is correct? (i) The smallest alkene which can show optical isomerism possesses 7 carbon atoms (ii) The smallest alkanes which can exist in the enantiomertic forms are -2-methy1lexane and 2,3-dimethy 1pentane (iii) The smallest alkane which has a meso steroisomer possesses 6 carbons (iv) 3,4-Dimethy1lexane has a mseo steroisomer.
Answer» (i)and (III) (ii) and (iv) (i),(ii),(iii),(iv) (i),(ii),(iv) Solution :Smallest alkane exhibiting OPTICAL isomerism contrains just one ASYMMETRIC carbon atom: Smallest alkane having a MESO steroisomer CONTAINS two identical asymmetric carbon atoms: