The correct order for acid strength of compounds CH ≡ CH , CH 3 - C ≡ CH and CH 2 = CH 2 is as follows:

HC ≡ CH > CH 3 - C ≡ CH > CH 2 = CH 2

CH 3 - C ≡ CH > CH ≡ CH > CH 2 = CH 2

CH ≡ CH > CH 2 = CH 2 > CH 3 - C ≡ CH

CH 2 - C ≡ CH > CH 2 = CH 2 > HC ≡ CH

The correct statement regarding the basicity of aryl amines is:

Aryl amines are generally less basic than alkyl amines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring π electron system.

Aryl amines are generally more basic than alkyl amines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring π electron system.

Aryl amines are generally more basic than alkyl amines because of aryl group.

Aryl amines are generally more basic than alkyl amines, because the nitrogen atom in aryl amines is sp-hybridized.

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 1>Q 288

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The ionistation constant of phenol is higher than that of ethanol because

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Important Questions on Organic Chemistry- Some Basic Principles and Techniques

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 1>Q 289

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Mark True and False statements related to the variation in $pKa$ values given for the compounds mentioned above?
$S_{1} :$ $III$ is more acidic than $I$ due to- $I$ effect of $- {NO}_{2}$ group.
$S_{2} :$ Due to $H$ -bonding in $II$ , it is slightly less acidic than $IV$ .
$S_{3} :$ Due to presence of $- m$ effect II $& IV$ are more acidic than that of $III$ .
$S_{4} :$ Mesomeric effect of $- {NO}_{2}$ group is not operative in case of $III$ with respect to - $OH$ group.