The correct statement regarding electrophile is :
1. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from another electrophile |
2. | Electrophiles are generally neutral species and can form a bond by accepting a pair of electrons from a nucleophile |
3. | Electrophiles can be either neutral or positively charged species and can form a bond accepting a pair of electrons from a nucleophile |
4. | Electrophile is a negatively charged species and can form a bond by accepting a pair of electrons from a nucleophile |
The correct statement about the SN1 reaction is:
1. | 100 % racemisation. |
2. | Inversion more than retention leads to partial racemisation. |
3. | 100 % retention. |
4. | 100 % Inversion. |
Which of the following statements is not correct for a nucleophile?
1. Nucleophile is a Lewis acid.
2. Ammonia is a nucleophile.
3. Nucleophiles attack low electron density sites.
4. Nucleophiles are not electron-seeking.
The species among the following that is not an electrophile is:
1.
2.
3.
4.
The compound that is least reactive towards nucleophilic substitution reaction is:
1.
2.
3.
4.
The correct order of reactivity towards the electrophilic substitution of the compounds aniline (I), benzene (II), and nitrobenzene (III) is:
1. III > II > I
2. II > III > I
3. I < II > III
4. I > II > III
In HS-, I-, RNH2, NH3 the correct order of proton accepting tendency will be:
1. | I- > NH3 > RNH2 > HS- | 2. | NH3 > RNH2 > HS- > I- |
3. | RNH2 > NH3 > HS- > I- | 4. | HS- > RNH2 > NH3 > I- |
Which of the following is most reactive towards electrophilic substitution reaction?
1. | 2. | ||
3. | 4. |