Among the following the antiaromatic compounds are:

I a n d I V

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I I I a n d V

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I I a n d V

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I a n d I I I

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Solution

The correct option is B $I I I a n d V$
Anti aromatic should contain $4 π e^{-}$ and is a cyclic planar structure. All the carbons are $s p^{2}$ hybridised and there are $4 π e^{-}$ in III and V structures, so these are anti aromatic.
I and IV are aromatic and II is non-aromatic.

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QUESTION 2.25(i)

Among the following compounds, identify which are insoluble, partially soluble and highly soluble in water?

(i) Phenol

(ii) Toluene

(iii) Formic acid

(iv) Ethylene glycol

(v) Chloroform

(vi) Pentanol

Match the following:

$\begin{matrix} (i) & Water & (A) & Compound (ii) & Hydrogen & (B) & Element (iii) & Salt (iv) & Gold (v) & Carbon dioxide (vi) & Iron \end{matrix}$
The correct pairs are:-

Match the following:

$\begin{matrix} (i) & Water & (A) & Compound (i i) & Hydrogen & (B) & Element (i i i) & Salt (i v) & Gold (v) & Carbon dioxide (v i) & Iron \end{matrix}$
The correct pairs are:-

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Among the following the antiaromatic compounds are:

The correct option is B III and VAnti aromatic should contain 4πe− and is a cyclic planar structure. All the carbons are sp2 hybridised and there are 4πe− in III and V structures, so these are anti aromatic. I and IV are aromatic and II is non-aromatic.

The correct option is B $I I I a n d V$
Anti aromatic should contain $4 π e^{-}$ and is a cyclic planar structure. All the carbons are $s p^{2}$ hybridised and there are $4 π e^{-}$ in III and V structures, so these are anti aromatic.
I and IV are aromatic and II is non-aromatic.