Question

In the following groups
$$\eqalign{ & \mathop { - OAc}\limits_{\left( {\text{i}} \right)} \cr & \mathop { - OMe}\limits_{\left( {{\text{ii}}} \right)} \cr & \mathop { - OS{O_2}Me}\limits_{\left( {{\text{iii}}} \right)} \cr & \mathop { - OS{O_2}C{F_3}}\limits_{\left( {{\text{iv}}} \right)} \cr} $$
the order of leaving group ability is

A. (i) > (ii) > (iii) > (iv)
B. (iv) > (iii) > (i) > (ii)  
C. (iii) > (ii) > (i) > (iv)
D. (ii) > (iii) > (iv) > (i)
Answer :   (iv) > (iii) > (i) > (ii)
Solution :
The more the electrons withdrawing groups attached to $$- O$$  atom, the more is the ease of leaving.

Releted MCQ Question on
Organic Chemistry >> General Organic Chemistry

Releted Question 1

The bond order of individual carbon-carbon bonds in benzene is

A. one
B. two
C. between one and two
D. one and two alternately
Releted Question 2

Molecule in which the distance between the two adjacent carbon atoms is largest is

A. Ethane
B. Ethene
C. Ethyne
D. Benzene
Releted Question 3

Among the following, the compound that can be most readily sulphonated is

A. benzene
B. nitrobenzene
C. toluene
D. chlorobenzene
Releted Question 4

The compound 1, 2-butadiene has

A. only $$sp$$   hybridized carbon atoms
B. only $$s{p^2}$$ hybridized carbon atoms
C. both $$sp$$  and $$s{p^2}$$ hybridized carbon atoms
D. $$sp$$ , $$s{p^2}$$ and $$s{p^3}$$ hybridized carbon atoms

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