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 4>Q 117

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${CH}_{3} - CHCl - {CH}_{2} - {CH}_{3}$ has a chiral centre which one of the following represents its $\mathrm{R}$ configuration:

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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 4>Q 118

In the following the most stable conformation of

n

-butane is:

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 4>Q 119

The correct corresponding order of names of four aldoses with configuration given below

Question Image

respectively, is

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 4>Q 120

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 4>Q 121

The decreasing order of the ratio of

HCN

addition to compounds

a

to

d

is:
(a)

HCHO

(b)

{CH}_{3} {COCH}_{3}

(c)

{PhCOCH}_{3}

(d)

PhCOPh

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 4>Q 122

An organic compound having molecular mass 60 is found to contain C = 20%, H = 6.67% and N = 46.67% while rest is oxygen. On heating it gives

N H_{3}

along with a solid residue. The solid residue gives violet colour with alkaline copper sulphate solution. The compound is

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 4>Q 123

Which of the following compounds will behave as a reducing sugar in an aqueous

KOH

solution?

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 4>Q 124

Presence of a nitro group in a benzene ring:

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Alpha Question Bank for Medical: Chemistry>Chapter 21 - Organic Chemistry- Some Basic Principles and Techniques>Exercise 4>Q 125

The electrophile, $E^{\oplus}$ attacks the benzene ring to generate the intermediate $σ$ -complex. Of the following, which $σ$ -complex is of lowest energy?