Question

Which of the following biphenyl compounds is optically active?

• A.
• B.
• C.
• D. All of the above.

Answer 1

The correct option is B

Biphenyl Systems show optical activity when the
following conditions are satisfied:

• Each ring should have 2 different ortho substituting groups.

In a left ring have 2 different ortho substituting groups while right ring has 2 same group thus it is optically inactive.
In b each ring have 2 different ortho substituting groups thus it is optically active.
In c left ring have 2 different ortho substituting groups while right ring have different group but not at ortho position, thus it is optically inactive.