In Duma’s method of estimation of nitrogen 0.35 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 300K= 15 mm)

1.	16.45	2.	17.45
3.	14.45	4.	15.45

The Lassaigne’s extract is boiled with conc. ${\mathrm{HNO}}_3$ while testing for halogens, because it:

1. Helps in the precipitation of $\mathrm{AgCl}$
2. Increases the solubility product of $\mathrm{AgCl}$
3. Increases the concentration of ${\mathrm{NO}}_3^{-}$ ions
4. Decomposes ${\mathrm{Na}}_2\mathrm{S}$ and $\mathrm{NaCN}$, if formed

The most reactive compound towards electrophilic reagent among the following is:

1.		2.
3.		4.

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

1.		2.
3.		4.

The IUPAC name of the compound having the formula CH≡C–CH=CH₂ is:

1. 3-butene-1-yne

2. 1-butyn-3-ene

3. but-1-yne-3-ene

4. 1-butene-3-yne

Which of the following compounds will exhibit cis-trans (geometrical) isomerism?

1. 2-butene

2. Butanol

3. 2-butyne

4. 2-butenol

The following compounds are given for reference
(1) CH₃-CH₂^–
(2) H₂C=CH^–
(3) HC≡C^– 

The increasing order of basic strength is:
1. (2)>(1)>(3)
2. (3) >(2) >(1)
3. (1) >(3) >(2)
4. (1) >(2)>(3)

How many stereoisomers does this molecule have? 

The stability of carbanions in the following:
 
is in the order of:

The correct order of acidity among the following is: