NEET · Chemistry · STD 11 - 9. Hydricarbon

Consider the following compounds/species: The number of compounds/species which obey Huckel's rule is \(..........\)

A \(6\)
B \(4\)
C \(5\)
D \(2\)

Verified Solution

Answer & Solution

Correct Answer

(B) \(4\)

Step-by-step Solution

Detailed explanation

Huckle's rule \(=(4 n+2) \pi\) electrons Comp \((i), (ii), (v), (vii)\) obey Huckle's rule.

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.

Same subject

Match List\(-I\) with List\(-II\).

List\(-II\)	List\(-II\)
\((a)\) \({PCl}_{5}\)	\((i)\) Square pyramidal
\((b)\) \({SF}_{6}\)	\((ii)\) Trigonal planar
\((c)\) \({BrF}_{5}\)	\((iii)\) Octahedral
\((d)\) \({BF}_{3}\)	\((iv)\) Trigonal bipyramidal

Choose the correct answer from the options given below.

NEET 2021 Easy

Which of the following salts will give highest \(pH\) in water?

NEET 2014 Easy

Match List I with List II :

List-I	List-II
(A) \(C _2 H _4\)	(I) \(3 \sigma\) bonds, \(2 \pi\) bonds
(B) \(C _2 H _2\)	(II) \(3 \sigma\) bonds, one lone pair
(C) \(CH _4\)	(III) \(4 \sigma\) bonds
(D) \(NH _3\)	(IV) \(5 \sigma\) bonds, \(1 \pi\) bond

Choose the correct answer from the options given below:

NEET 2026 Hard

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