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.
2.
3.
4.
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. while testing for halogens, because it:
1. Helps in the precipitation of
2. Increases the solubility product of
3. Increases the concentration of ions
4. Decomposes and , 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?
1. | CH3COOH > BrCH2COOH > ClCH2COOH > FCH2COOH |
2. | FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH |
3. | BrCH2COOH > ClCH2COOH > FCH2COOH > CH3COOH |
4. | FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH |
The general molecular formula, which represents the homologous serious of alkanols is:
1.
2.
3.
4.
The correct order regarding the electronegativity of hybrid orbitals of carbon is:
1.
2.
3.
4.
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