Which of the following is the strongest nucleophile?

1. Br^-         
2. OH^-
3. CN^-        
4. CH₃O^-

The most reactive of these compounds towards sulphonation is

1. Toluene                2. Chlorobenzene

3. Nitrobenzene        4. m-Xylene

Identify the structure of x,

(1)

(2)

(3)

(4)

Among the following anions (a) CH₃, (b) NH₂, (c) OH^-, (d) F^-, the order of basicity is:

1. a > b > c > d

2. b > a > c > d

3. c > b > a > d

4. c > a > b > d

H₂C = O behaves as:

1. Nucleophile

2. Electrophile

3. Both (1) and (2)

4. None of the above 

Electrophiles are:

1. electron loving species            

2. electron hating species

3. nucleus loving reagents            

4. nucleus hating reagents

Nucleophiles are:

1. electron loving

2. electron hating

3. nucleus loving

4. nucleus hating

Which of the following is strongest nucleophile?

1. Br^-

2. $\stackrel{..}{\mathrm{O}}H$

3. $\stackrel{..}{\mathrm{C}}N$

4. ${\mathrm{C}}_2{\mathrm{H}}_5\stackrel{..}{\mathrm{O}}$

(CH₃)₄N⁺ is neither an electrophile, nor a nucleophile because it:

1. does not have electron pair for donation as well as cannot attract electron pair

2. neither has electron pair available for donation nor can accommodate electron since all shells of N are fully occupied.

3. can act as Lewis acid and base

4. none of the above

Which of the following is an electrophilic reagent?

1. RO^-

2. BF₃

3. NH₃

4. ROH