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Q. No.Subtopic: Preparation of the Organic and Inorganic compounds |
73%
Level 2: 60%+
Hints
What is the first step in the preparation of p-nitroacetanilide?
1. Nitration of acetanilide
2. Acetylation of aniline
3. Nitration of nitrobenzene
4. Acetylation of nitrobenzene
1. Nitration of acetanilide
2. Acetylation of aniline
3. Nitration of nitrobenzene
4. Acetylation of nitrobenzene
Subtopic: Preparation of the Organic and Inorganic compounds |
68%
Level 2: 60%+
Hints
In the preparation of p-nitroacetanilide, what role does acetic anhydride play?
1. It acts as a catalyst
2. It serves as a solvent
3. It acetylates the amino group
4. It nitrosylates the amino group
1. It acts as a catalyst
2. It serves as a solvent
3. It acetylates the amino group
4. It nitrosylates the amino group
Subtopic: Preparation of the Organic and Inorganic compounds |
76%
Level 2: 60%+
Hints
Given below are two statements:
1. Statement I is incorrect and Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct and Statement II is incorrect.
| Statement I: | Mix the water extract with Fe(II) sulphate solution and add one drop of \(HNO_3\) along side of the test tube. |
| Statement II: | Formation of brown ring at the junction of the acid and the solution. |
1. Statement I is incorrect and Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct and Statement II is incorrect.
Subtopic: Detection of Anions |
81%
Level 1: 80%+
Hints
When synthesizing acetanilide from aniline, ice-cold water is introduced to the reaction mixture after heating to
1. dissolve acetanilide
2. initiate the reaction
3. neutralize the solution
4. wash the crude acetanilide
1. dissolve acetanilide
2. initiate the reaction
3. neutralize the solution
4. wash the crude acetanilide
Subtopic: Preparation of the Organic and Inorganic compounds |
Level 3: 35%-60%
Hints
What are the characteristics of the crystals obtained after crystallization during the synthesis of acetanilide from aniline?
1. Yellow and irregularly shaped
2. White and needle-shaped
3. Blue and spherical
4. Red and cubic
Subtopic: Detection of the functional groups |
57%
Level 3: 35%-60%
Please attempt this question first.
Hints
What is observed visually when ammonium hydroxide and hydrochloric acid react?
| 1. | Red coloration | 2. | White fumes |
| 3. | Blue precipitate | 4. | No visible change |
Subtopic: Detection of Anions |
88%
Level 1: 80%+
Hints
Mark the correct representation of the compound that is formed when \(\mathrm{AgCl}\) reacts with ammonia:
| 1. | \(\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right] \mathrm{Cl} \text { }\) | 2. | \(\left[\mathrm{Ag}\left(\mathrm{NH}_4\right)_2\right] \mathrm{Cl} \text { }\) |
| 3. | \(\left[\mathrm{Ag}\left(\mathrm{NH}_2\right)_2\right] \mathrm{} \text {Cl }\) | 4. | AgNO3 |
Subtopic: Detection of Anions |
74%
Level 2: 60%+
Hints
Which solvent is used to dissolve the mixture of o-nitroacetanilide and p-nitroacetanilide for separation?
1. Water
2. Ethanol
3. Acetone
4. Hexane
1. Water
2. Ethanol
3. Acetone
4. Hexane
Subtopic: Preparation of the Organic and Inorganic compounds |
51%
Level 3: 35%-60%
Hints
In the presence of zinc, what chemical process is hindered during the reaction involving aniline?
| 1. | Reduction | 2. | Oxidation |
| 3. | Hydrolysis | 4. | Polymerization |
Subtopic: Preparation of the Organic and Inorganic compounds |
59%
Level 3: 35%-60%
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