NEET Exam  >  NEET Tests  >  NCERTs at Fingertips: Textbooks, Tests & Solutions  >  Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - NEET MCQ

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - NEET MCQ


Test Description

30 Questions MCQ Test NCERTs at Fingertips: Textbooks, Tests & Solutions - Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT)

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) for NEET 2024 is part of NCERTs at Fingertips: Textbooks, Tests & Solutions preparation. The Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) questions and answers have been prepared according to the NEET exam syllabus.The Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) below.
Solutions of Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) questions in English are available as part of our NCERTs at Fingertips: Textbooks, Tests & Solutions for NEET & Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) solutions in Hindi for NCERTs at Fingertips: Textbooks, Tests & Solutions course. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free. Attempt Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) | 30 questions in 30 minutes | Mock test for NEET preparation | Free important questions MCQ to study NCERTs at Fingertips: Textbooks, Tests & Solutions for NEET Exam | Download free PDF with solutions
Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 1

Heterolysis of a carbon-chlorine bond produces

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 1

In C - Cl bond, the electron pair is carried away by Cl atom due to higher electronegativity.
C - Cl → C+ + Cl-
Hence, carbon cation and chlorine anion are formed.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 2

Which of the following is an electrophilic reagent?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 2

Electron deficient species act as electrophiles i.e., NO+2.

1 Crore+ students have signed up on EduRev. Have you? Download the App
Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 3

Which of the following sets of groups contains only electrophiles?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 3

NO2+,AlCl3,SOand CH3C= O are electrophiles.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 4

Inductive effect involves

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 4

Due to displacement of a-electrons towards more electronegative atom the bond becomes polar. The polar bond induces polarityto the adjacent bonds, this is inductive effect.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 5

The increasing order of electron donating inductive effect of alkyl groups is

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 5

The order of +I effect of alkyl group is given as

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 6

Inductive effect of which atom or group is taken as zero to compare inductive effect of other atoms?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 6

Hydrogen does not exert I-effect. Its inductive effect is taken as zero. Electron releasing or electron withdrawing capability of other atoms are compared by hydrogen.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 7

Maximum -I effect is exerted by the group

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 7

-NO2 shows maximum electron with drawing or - I effect.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 8

Which one of the following acids would you expect to be the strongest?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 8

Fluorine is most electronegative atom and exerts maximum -I effect Hence F - CH2COOH is the strongest acid.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 9

 Few pairs of molecules are given below. Which bond of the molecule of the pairs is more polar?
(i) H3C - H, H3C - Br
(ii) H3C-NH2,H3C-0H
(iii) H3C - OH, H3C - SH
(iv) H3C - Cl, H3C - Br

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 9

(i) Br is more electronegative than H.
(ii) O is more electronegative than N.
(iii) O is more electronegative than S.
(iv) C1 is more electronegative than Br.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 10

Which of the following is the correctorder of acidity of carboxylic acids?
(i) CI3CCOOH > CI2CHCOOH > CICH2COOH
(ii) CH3CH2COOH > (CH3)2CHCOOH > CCH3)3CCOOH
(iii) F2CHCOOH > FCH2COOH > CICH2COOH

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 10

The strength of the acid increases with the inductive effect of the electronegative group attached to it (-I effect). The strength of the acid decreases with the presence of electron releasing group.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 11

Point out the incorrect statement about resonance?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 11

The resonating structures should have same number of electron pairs.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 12

Which of the following ions is the most resonance stabilised?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 12

Phenoxide ion shows maximum resonating structures.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 13

Hyperconjugation is

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 13

Hyperconjugation involves conjugation of a electrons of C - H bond and π electrons of multiple bond.
It is noticed due to delocalisation of σ- and π-bonds. It is . also known as no bond resonance.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 14

The number of hyperconjugating structures shown by the carbocations are given below. Which one is not correctly matched?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 14

shows 6 hyperconjuigatihg structures

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 15

In which of the following species hyperconjugation is possible?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 15

For hyperconjugation α-carbon with respect to sp2 hybridised carbon should have at least one hydrogen.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 16

Answer the following question based on the given paragraph.
Stability of carbocation, alkylfree radical and alkene can be explained on the basis of hyperconjugation.
In all these cases, there is presence ofhydrogen atom at theadjacent carbon atom ofsp2 hybridised carbon atom. Total number of hyperconjugating structures depends upon the number of hydrogen atoms present at adjacent carbon atom of sp2 C-atom.
More the hyperconjugating structures, more is the stabihty of the ion.

Decreasingorder of stabilityof following alkenes is
(i) CH3 - CH = CH2
(ii) CH3 - CH = CH - CH3
(iii) 
(iv) 

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 16

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 17

Which of the following alcohols on dehydration gives most stable carbocation? 

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 17


Tertiary carbocation is more stable than secondary and primary carbocatioris.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 18

Which of the following contains three pairs of electrons in valence shell?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 18

In carbocations, the carbon atom with positive charge has only 6 electrons in its valence shell.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 19

Stability of alkyl carbocations can be explained by

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 19

Stability of alkyl carbocations can be explained by both inductive effect and hyperconjugation.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 20

In the given reaction two products are expected.

The product (B) is formed as a major product because

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 20



Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 21

The carbocation is less stable than

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 21

(CH3)3C+ is more stable than . Rest all are primary carbocations hence less stable.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 22

Complete the following reactions by filling most stable intermediate and the product.
(i) 
(ii) 

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 22

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 23

Which of the following statements is not true about the stability of carbanions?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 23

Order of stability of carbanions is 1º > 2º > 3º;

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 24

Which of the following carbanion expected to be most stable?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 24

Carbanions are stabilised by electron withdrawing groups. - NO2 is stronger electron withdrawing group as compared to - CHO. At orthoposition, the effect is more pronounced.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 25

The order of decreasing stability of the following carbanions is
(i) (CH3)3C-
(ii) (CH3)2CH-
(iii) CH3CH-2
(iv) C6H5CH-2

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 25

Stability of carbanions decreases with increase in +l effect. + I effect is maximum in (CH3)3C-, followed by (CH3)2CH- and CH3CH-2. In C6H5CH-2, resonance effect increases the stability. Hence, the order of stability is (iv) > (iii) > (ii) > (i).

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 26

Free radicals can undergo

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 26

Free radicals can undergo all given types of processes.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 27

The most stable free radical among the following Is

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 28

Which of the following Is a characteristic feature of a free radical?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 28

Free radical is formed as a result of homolytic fission hence it has an unpaired electron.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 29

The increasing order of stability of the following free radicals is

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 29

Radical is stabilized by α hydrogen. More the α-hydrogen more will be hyperconjugation more will be radical stabilization resonance. Resonance is also a good stabilizing factor and is given preference than hyperconjugation.

Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 30

Which of the following is a false statement?

Detailed Solution for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) - Question 30

The electronegative atom in the carbon chain produces -I effect.

304 docs|275 tests
Information about Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) Page
In this test you can find the Exam questions for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT) solved & explained in the simplest way possible. Besides giving Questions and answers for Test: Fundamental Concepts in Organic Reaction Mechanism (NCERT), EduRev gives you an ample number of Online tests for practice

Up next

Download as PDF

Up next