Question

4. which of the following does
not have centre of symmetry (i)
A. Benzene
B. CO2
C. SF6
D. Cis dichloroloethylene​

Answer 1

Answer:

(a) answer is a benzene.

as benzene C6H6 is a cyclic compund so it has no center of symmetry.

Answer 2

A. Benzene does not have center of symmetry

Explanation:

• The center of symmetry (COS) is the center in a molecule which reflects back through point that are equidistant in opposite direction, and equivalent groups are present in it.
• In it identical atoms are diametrically opposite.
• Carbon dioxide has a COS at C atom with oxygen atoms opposite to each other.
• SF6 also has a COS at Sulphur, which three diametrically opposite pairs of fluorine.
• In cis-dichloroethylene COS is also present as it is aliphatic compound.
• Benzene is a cyclic compound so it will not have a COS.