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Q. No.Which gas gives dense white fumes when reacted with ammonium hydroxide?
1. Oxygen gas
2. Hydrogen gas
3. HCl gas
4. Ammonia gas
Subtopic: Detection of Anions |
79%
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What color precipitate indicates the presence of phosphate ions in the test solution containing ammonium molybdate solution,conc. HNO3 and boil to the test solution containing phosphate ions?
1. Blue
2. Canary yellow
3. Red
4. Green
1. Blue
2. Canary yellow
3. Red
4. Green
Subtopic: Detection of Anions |
86%
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What substance is introduced following dilute HCl in the procedure to verify
1. Distilled water
2. Carbon disulphide
3. Bromine water
4. Iodine crystals
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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