The best method used for the separation of naphthalene and benzoic acid from their mixture is -
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation

The total number of resonating structures (excluded the given structure) formed by the given molecule are :

The carbocation among the following that doesn't get stabilized by resonance is :

1.		2.
3.		4.

The correct statement regarding electrophile is :

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

In Kjeldahl’s method for estimation of nitrogen present in the soil sample, ammonia evolved from 0.75g of sample neutralized 10ml of 1M H₂SO₄. The percentage of nitrogen in the soil is:

The most stable conformation of n-butane among the following is:

1.		2.
3.		4.

The IUPAC name of the above mentioned compound is - 

1. 3, 4-Dimethylpentanoyl chloride

2. 1-Chloro-1-oxo-2,3-dimethylpentane

3. 2-Ethyl-3-methylbutanoylchloride

4. 2, 3-Dimethylpentanoyl chloride

In Duma's method of estimation of nitrogen, 0.35 g of an organic compound gave 55 ml of nitrogen collected at 300 K temperature and 715 mm pressure. The percentage composition of nitrogen in the compound would be:

(Aqueous tension at 300 K = 15 mm)

1. 16.45

2. 27.45

3. 44.45

4. 35.45