Given : \(I\) and \(II\) are

A identical
B a pair of conformers
C a pair of geometrical isomers
D a pair of optical isomers

Verified Solution

Answer & Solution

Correct Answer

(B) a pair of conformers

Step-by-step Solution

Detailed explanation

Rotating in front carbon by \(180^{\circ}\) we find structure second. Thus both the structures are conformers of each other.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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From NEET

Match the following columns with reference to cockroach and select the correct option:

Column \(I\)	Column \(II\)
(a) Grinding of the food particies	(i) Hepatic caecae
(b) Secrete gastric juice	(ii) \(10^{\text {th }}\) segment
(c) \(10\) pairs	(ii) Proventriculus
(d) Anal Cerci	(iv) Spiracles
	(v) Alary muscles

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Column - \(I\)	Column - \(II\)
\((a)\) Copper	\((i)\) Non-metal
\((b)\) Fluorine	\((ii)\) Transition Metal
\((c)\) Silicon	\((iii)\) Lanthanoid
\((d)\) Cerium	\((iv)\) Metalloid