Lassaigne's extract is boiled with conc. HNO3 while testing for halogens. By doing so, it:
1. Helps in the precipitation of AgCl
2. Increases the solubility product of AgCl
3. Increases the concentration of NO3- ions
4. Decomposes Na2S and NaCN, if formed.
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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. 17.45
3. 14.45
4. 15.45
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Hydrogen cyanide and hydrogen isocyanide are:
1. Tautomers
2. Positional isomers
3. Metamers
4. Chain isomers
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Buta-1,3-diene and But-2-yne are:
1. Position isomers
2. Functional isomers
3. Chain isomers
4. Tautomers
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(CH3)4N+ is neither an electrophile nor a nucleophile because of it:
| 1. | Does not have an electron pair for donation and it also cannot attract an electron pair. |
| 2. | Neither has an electron pair available for donation nor can accommodate electrons since all shells of N are fully occupied. |
| 3. | Can act as Lewis acid and base. |
| 4. | None of the above. |
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The stability of 2,3-dimethylbut-2-ene is more than 2-butene. This can be explained in terms of:
1. Resonance
2. Hyperconjugation
3. Electromeric effect
4. Inductive effect
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