- 1(current)
Q. No.Match List I with List II and mark the appropriate answer:
Codes
| List-I (Quantitative Methods) |
List-II (Principle and reagents used) |
||
| A. | Thin Layer Chromatography | (i). | Partition Chromatography |
| B. | Yellow coloured | (ii). | Adsorption chromatography |
| C. | Paper chromatography | (iii). | Ammonia |
| D. | Kjeldahl method | (iv). | (NH4)3PO4.12MoO3 |
Codes
| A | B | C | D | |
| 1. | (iii) | (iv) | (ii) | (i) |
| 2. | (ii) | (iv) | (i) | (iii) |
| 3. | (ii) | (i) | (iv) | (iii) |
| 4. | (iii) | (iv) | (i) | (ii) |
Subtopic: Qualitative Analysis of Organic Compounds | Quantitative Analysis of Organic Compounds |
90%
Level 1: 80%+
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The sodium extract of an organic compound on acidification with acetic acid and the addition of lead acetate solution gives a black precipitate.
The organic compound contains:
| 1. | Nitrogen | 2. | Halogen |
| 3. | Sulphur | 4. | Phosphorus |
Subtopic: Qualitative Analysis of Organic Compounds |
84%
Level 1: 80%+
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Which of the following element\((\text{S})\) is/are confirmed by appearance of blood red colour with \(\text{FeCl}_3\) in Lassaigne's test?
1. Presence of \(\text{S}\) only
2. Presence of \(\text{N}\) & \(\text{S}\)
3. Presence of \(\text{N}\) only
4. Presence of \(\text{P}\) only
1. Presence of \(\text{S}\) only
2. Presence of \(\text{N}\) & \(\text{S}\)
3. Presence of \(\text{N}\) only
4. Presence of \(\text{P}\) only
Subtopic: Qualitative Analysis of Organic Compounds |
86%
Level 1: 80%+
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The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is:
1. Fe4[Fe(CN)6]3
2. Na3[Fe(CN)6]
3. Fe(CN)3
4. Na4[Fe(CN)5NOS]
Subtopic: Qualitative Analysis of Organic Compounds |
77%
Level 2: 60%+
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Given below are two statements:
| Assertion (A): | Simple distillation can help in separating a mixture of propan-1-ol (boiling point 97°C ) and propanone (boiling point 56°C ). |
| Reason (R): | Liquids with a difference of more than 20°C in their boiling points can be separated by simple distillation. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Qualitative Analysis of Organic Compounds |
86%
Level 1: 80%+
Hints
Given below are two statements:
Options:
| 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. |
Subtopic: Qualitative Analysis of Organic Compounds |
84%
Level 1: 80%+
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Which one of the following set of elements can be detected using sodium fusion extract ?
1. Sulfur, Nitrogen, Phosphorus, Halogens
2. Phosphorus, Oxygen, Nitrogen, Halogens
3. Halogens, Nitrogen, Oxygen, Sulfur
4. Nitrogen, Phosphorus, Carbon, Sulfur
1. Sulfur, Nitrogen, Phosphorus, Halogens
2. Phosphorus, Oxygen, Nitrogen, Halogens
3. Halogens, Nitrogen, Oxygen, Sulfur
4. Nitrogen, Phosphorus, Carbon, Sulfur
Subtopic: Qualitative Analysis of Organic Compounds |
83%
Level 1: 80%+
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- 1(current)
Q. No.
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