Which of the following is the most unlikely resonance structure for the p-nitrophenoxide ion?

1.		2.
3.		4.

Which of the following is an electrophilic reagent?

1. RO^-

2. BF₃

3. NH₃

4. ROH

The +I (inductive effect) is shown by:

1. -CH₃

2. -OH

3. -F

4. -C₆H₅

The-I effect is shown by:

1. -COOH

2. -CH₃

3. -CH₃CH₂

4. -CHR₂

Which of the following is singlet carbene?

1. (CH₃)₃C⁺

2. C₂H₅-CH

3. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2^{-}$

4. CH₂ =CH-${\mathrm{CH}}_2^{+}$

Arrange H, CH₃, C₂H₅, and C₃H₇ in order of increasing positive inductive effect:

1. H < CH₃ < C₂H₅ < C₃H₇

2. H> CH₃ <C₂H₅ > C₃H₇

3. H < C₂H₅ < CH₃ <C₃H₇

4. None of the above

To which ring size cycloalkanes, Baeyer’s strain theory is not valid?

(1) 3 carbon

(2) 4 carbon

(3) 5 carbon

(4) ≥6 carbon

The shifting of electrons of  multiple bonds under the influence of a reagent is called:

1. I-effect

2. E-effect

3. M-effect

4. None of the above.

Which of the following statements accurately describes the stability of allyl and propyl carbocations?

1. Allyl carbocation (CH₂=CH-CH₂⁺) is more stable than propyl carbocation

2. Propyl carbocation is more stable than allyl carbocation

3. Both are equally stable

4. None of the above

Sulphur trioxide act as:

1. An electrophile             

2. A nucleophile

3. A homolytic agent         

4. A base