The correct order with respect to –I effect of the substituents is:
(R = alkyl)

1. -NH₂ > - OR < - F
2. -NR₂ < -OR < - F
3. -NH₂ > - OR > - F
4. -NR₂ > - OR > - F

The most stable carbocation among the following is:

1.		2.
3.		4.

The correct statement about the S_N1 reaction is:

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.

Two possible stereo-structures of CH₃CHOH.COOH, that are optically active, called:

In Duma's method for estimation of nitrogen, 0.25 g of an organic compound gave 40 mL of nitrogen collected at 300 K temperature and 725 mm pressure. If the aqueous tension at 300 K is 25 mm, the percentage of nitrogen in the compound is:

In which of the following compounds, the C—Cl bond ionization shall give the most stable carbonium ion?

1.		2.
3.		4.

Hyperconjugation occurs among the following compounds:

The enolic form of ethyl acetoacetate is given below-

 

The number of σ and π bonds in the enolic form are respectively:

1. 18 sigma bonds and 2 pi-bonds
2. 16 sigma bonds and 1 pi-bond
3. 9 sigma bonds and 2 pi-bonds
4. 9 sigma bonds and 1 pi-bond