- 1(current)
Q. No.1. Na4[Fe(CN)5NOS]
2. Na2[Fe(CN)5NO]
3. K4[Fe(CN)6]
4. Fe4[Fe(CN)6]3
Use the provided information in the following paper chromatogram.
Figure: Paper chromatography for compounds A and B.
The Rf value of A is Y×10–1. The value of Y is:
| 1. | 2 | 2. | 3 |
| 3. | 4 | 4. | 8 |
Which of the following compounds is added to the sodium extract before the addition of silver nitrate for testing of halogens?
| 1. | Nitric acid | 2. | Ammonia |
| 3. | Hydrochloric acid | 4. | Sodium hydroxide |
Glycerol is separated in soap industries by:
1. Steam Distillation
2. Distillation under reduced pressure
3. Fractional distillation
4. Differential extraction
In chromatography, which of the following statements is incorrect for Rf?
1. Rf value depends on the type of chromatography.
2. Higher Rf value means higher adsorption.
3. Rf value is dependent on the mobile phase.
4. The value of Rf can never be more than one.
Which of the following is the principle behind column chromatography?
| 1. | Gravitational force. |
| 2. | Capillary action. |
| 3. | Differential adsorption of the substances on the solid phase. |
| 4. | Differential absorption of the substances on the solid phase. |
| Statement I: | In the Lassaigne test, an organic compound with both N and S, responds to the test of SCN-. |
| Statement II: | In the Lassaigne test, if Na is taken in excess, it destroys SCN- and forms Na2S and NaCN. |
| 1. | Statement I is correct and Statement II is incorrect. |
| 2. | Statement I is incorrect and Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
1. NH4OH
2. NH4Cl
3. N2H4
4. CH3 – NH2
| 1. | \(\mathrm{I}^{-}\) | 2. | \(\mathrm{Cl}^{-}\) |
| 3. | \(\mathrm{Br}^{-}\) | 4. | \(\mathrm{NO}_2^{-}\) |
- 1(current)
Q. No.
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