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Q. No.What substance is introduced following dilute HCl in the procedure to verify
the presence of halogens in the layer Test?
1. Distilled water
2. Carbon disulphide
3. Bromine water
4. Iodine crystals
Subtopic: Detection of Anions |
55%
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What colour indicates the presence of bromide ions in the layer's test?
1. Orange
2. Violet
3. Blue
4. Green
1. Orange
2. Violet
3. Blue
4. Green
Subtopic: Detection of Anions |
68%
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During the borax bead test with \(\mathrm{CuSO}_4\), a blue-green colour of the bead is observed in oxidizing flame due to the formation of:
1. \(\mathrm{CuO}\)
2. \(\mathrm{Cu}\left(\mathrm{BO}_2\right)_2\)
3. \(\mathrm{Cu} \mathrm{~B02}\)
4. \(\mathrm{Cu}\)
1. \(\mathrm{CuO}\)
2. \(\mathrm{Cu}\left(\mathrm{BO}_2\right)_2\)
3. \(\mathrm{Cu} \mathrm{~B02}\)
4. \(\mathrm{Cu}\)
Subtopic: Preparation of the Organic and Inorganic compounds |
85%
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Which of the following is a chemical property of Mohr's salt?
| 1. | It effloresces in dry air |
| 2. | It decomposes upon heating to produce sulfur dioxide gas |
| 3. | It has a density of approximately 2.22 g/cm³ |
| 4. | It is soluble in nonpolar solvents like benzene |
Subtopic: Preparation of the Organic and Inorganic compounds |
61%
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Mark the correct option regarding the Preparation of Double Salt: Ferrous Ammonium Sulphate.
| Assertion (A). | Equimolar quantities of reacting compounds are used in the preparation of double salts. |
| Reason (R) | The properties of the individual cation or anion do not change in double salts when it gets dissociated. |
| 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: Preparation of the Organic and Inorganic compounds |
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Which of the following ions is responsible for the acidic nature of a solution of potash alum?
1.\(Al^{3+}\)
2. \(K^+\)
3. \(SO^{2-}_4\)
4. \(OH^-\)
1.\(Al^{3+}\)
2. \(K^+\)
3. \(SO^{2-}_4\)
4. \(OH^-\)
Subtopic: Preparation of the Organic and Inorganic compounds |
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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 |
67%
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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 |
75%
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Read the statements regarding the Nitrate \((NO^-_3)\) ion
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.
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 |
83%
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What is observed visually when ammonium hydroxide and hydrochloric acid react?
1. Red coloration
2. White fumes
3. Blue precipitate
4. No visible change
1. Red coloration
2. White fumes
3. Blue precipitate
4. No visible change
Subtopic: Detection of Anions |
89%
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