M.Sc. (First Year) Organic Chemistry CHE-103 (Practice set-4)

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Solve the multiple Choice questions and see Your score

1.What is the correct decreasing order of stability of following cation?

2 points

I > II > III > IV

I > IV > II > III

I > III > II > IV

IV > III > II > I

Clear selection

2.What is the correct decreasing order of stability of following cation?

2 points

II > III > I > IV

IV > II > III > I

IV > III > I > II

III > I > II > IV

Clear selection

3.The order of decreasing stability of the following cations is?

2 points

III > II > I

I > II > III

II > I > III

I > III > II

Clear selection

4. Nitro group is meta-directing in electrophilic aromatic substitution reactions?

2 points

increases electron density at meta-position

increases electrons density at ortho and para-positions

decreases electron density at meta-position

decreases electron density at ortho and para-positions

Clear selection

5. Benzyl chloride is reacted with different nucleophiles (HO–, CH3COO–, PhO–, CH3O–). Arrange them in the decreasing order of reactivity with Benzyl chloride.

2 points

CH3O– > HO– > PhO– > CH3COO–

HO– > CH3O– > PhO– > CH3COO–

HO– > PhO– > CH3O– > CH3COO–

CH3COO– > CH3O– > HO– > PhO–

Clear selection

6. Which of the following statement is correct?

2 points

Each of the above reactions is likely to be SN2

Each of the above reactions is likely to be SN1

First two reactions follow SN2 and next two reactions follow SN1 pathway

There is no role of “steric factor”

Clear selection

7. What is the correct order of nucleophilicity in the following options?

2 points

(CH3)3CO– > CH3–

CH3S– > CH3SH

CH3CH2CH2O– < (CH3)3CO–

(CH3CH2)3N > (CH3CH2)3P

Clear selection

8.Which of the following type of reaction shows heterolytic bond cleavage?

2 points

SN1 reaction

Addition reaction

Elimination reaction

Free radical halogenation

Clear selection

9.Which species are formed due to Homolytic bond breakage?

2 points

Anion

Cation

Free radical

Atoms

Clear selection

10.Electrons movement take place from __________

2 points

positively to negatively components

negatively to positively charged components

neutral to charged species

charged species to neutral

Clear selection

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