NEET Chemistry
Qualitative Analysis Of Organic Compounds
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Weightage: 5 / 20 Yrs
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2011 Questions 5 MCQs
01
PYQ 2011
easy
chemistry ID: neet-201
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
1
(1)
2
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3
(3)
4
(4)
02
PYQ 2017
easy
chemistry ID: neet-201
The most suitable method used for the separation of 1:1 mixture of ortho and para-nitrophenols is:
1. Chromatography
2. Crystallization
3. Steam distillation
4. Sublimation
1. Chromatography
2. Crystallization
3. Steam distillation
4. Sublimation
1
(1)
2
(2)
3
(3)
4
(4)
03
PYQ 2023
easy
chemistry ID: neet-202
In Lassaigne's extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with due to the formation of:
1.
2.
3.
4.
1.
2.
3.
4.
1
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2
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3
(3)
4
(4)
04
PYQ 2024
easy
chemistry ID: neet-202
On heating, some solid substances change from solid to vapour state without passing through liquid state. The technique used for the purification of such solid substances based on the above principle is known as:
| 1. | Sublimation | 2. | Distillation |
| 3. | Chromatography | 4. | Crystallization |
1
(1)
2
(2)
3
(3)
4
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05
PYQ 2025
easy
chemistry ID: neet-202
Which one of the following reactions does not belong to "Lassaigne's test"?
| 1. | |
| 2. | |
| 3. | |
| 4. |
1
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2
(2)
3
(3)
4
(4)