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:

1.	37.33	2.	45.85
3.	25.75	4.	43.13

Which structure corresponds to the IUPAC name 3-Ethyl-2-hydroxy-4-methylhex-3-en-5-ynoic acid?

1.		2.
3.		4.

The correct order of increasing bond length of  C-H, C-O, C-C and C=C is:

1.  $\mathrm{C}-\mathrm{C}<\mathrm{C}=\mathrm{C}<\mathrm{C}-\mathrm{O}<\mathrm{C}-\mathrm{H}$

2.  $\mathrm{C}-\mathrm{O}<\mathrm{C}-\mathrm{H}<\mathrm{C}-\mathrm{C}<\mathrm{C}=\mathrm{C}$

3.  $\mathrm{C}-\mathrm{H}<\mathrm{C}-\mathrm{O}<\mathrm{C}-\mathrm{C}<\mathrm{C}=\mathrm{C}$

4.  $\mathrm{C}-\mathrm{H}<\mathrm{C}=\mathrm{C}<\mathrm{C}-\mathrm{O}<\mathrm{C}-\mathrm{C}$

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)

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

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 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

What is the correct sequence of acidity for the following compounds?

Which of the following represents the general molecular formula of the homologous series of alkanols?

1. $C_n{H}_{2n}{O}_2$

2. $C_n{H}_{2n}O$

3. $C_n{H}_{2n+1}O$

4. $C_n{H}_{2n+2}O$

The correct order regarding the electronegativity of hybrid orbitals of carbon is:

1. $sp>s{p}^2<s{p}^3$

2. $sp>s{p}^2>s{p}^3$

3. $sp<s{p}^2>s{p}^3$

4. $sp<s{p}^2<s{p}^3$

The IUPAC name of  is : 

1. 3, 4-Dimethylpentanpyl chloride

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

3. 2-Ethyl-3-methylbutanoyl chloride

4. 2, 3-Dimethylpentanoyl chloride