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Q. No.Select the correct option based on the statements below:
Assertion (A):
NaCl reacts with concentrated H2SO4 to give colourless fumes with a pungent smell. But on adding MnO2, the fumes become greenish-yellow.
Reason (R):
MnO2 oxidizes HCl to chlorine gas which is greenish-yellow.
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: Group 17 - Preparation, Properties & Uses |
85%
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Select the correct option based on statements below:
| Assertion (A): | SF6 cannot be hydrolysed but SF4 can be. |
| Reason (R): | Six F-atoms in SF6 prevent the attack of H2O on sulphur atom of SF6 |
| 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: Group 16 - Preparation, Properties & Uses |
85%
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Select the correct option based on statements below:
| Assertion (A): | Both rhombic and monoclinic sulphur exist as S8 but oxygen exists as O2. |
| Reason (R): | Oxygen forms pπ - pπ multiple bonds due to its small size and small bond length but pπ - pπ bonding is not possible in sulphur. |
| 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. | Both (A) and (R) are False. |
Subtopic: Group 16 - Preparation, Properties & Uses |
73%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | HI cannot be prepared by the reaction of KI with concentrated H2SO4. |
| Reason (R): | HI has the lowest H—X bond strength among halogen acids. |
| 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: Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
51%
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Given below are two statements:
| Assertion (A): | HNO3 makes iron passive. |
| Reason (R): | HNO3 forms a protective layer of ferric nitrate on the surface of the iron. |
| 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: Group 15 - Preparation, Properties & Uses |
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Given below are two statements:
| Assertion (A): | N2 is less reactive than P4. |
| Reason (R): | Nitrogen has more electron gain enthalpy than phosphorus. |
| 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: Group 15 - Preparation, Properties & Uses |
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Match the species given in Column I with the shape given in Column II and mark the correct option.
| Column I | Column II | ||
| A. | Its partial hydrolysis does not change the oxidation state of the central atom. | 1. | He |
| B. | It is used in modern diving apparatus. | 2. | XeF6 |
| C. | It is used to provide an inert atmosphere for filling electrical bulbs. | 3. | XeF4 |
| D. | Its central atom is in sp3d2 hybridisation. | 4. | Ar |
Codes:
| Options: | A | B | C | D |
| 1. | 1 | 4 | 2 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2 | 1 | 4 | 3 |
| 4. | 1 | 3 | 2 | 4 |
Subtopic: Group 18 - Preparation, Properties & Uses |
91%
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Match the species given in Column I with the shape given in Column II and mark the correct option.
| Column I (Specie) | Column II (Shape) | ||
| A. | \(\mathrm{SF}_4\) | (I) | Tetrahedral |
| B. | \(\mathrm{BrF}_3\) | (II) | Pyramidal |
| C. | \(\mathrm{BrO}_3^{-}\) | (III) | Sea-saw shaped |
| D. | \(\mathrm{NH}_4^{+}\) | (IV) | Bent T-shaped |
Codes:
| A | B | C | D | |
| 1. | III | II | I | IV |
| 2. | III | IV | II | I |
| 3. | I | II | III | IV |
| 4. | I | IV | III | II |
Subtopic: Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
84%
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Match the items in Columns I and II and mark the correct option.
| Column I | Column II |
| A. H2SO4 | 1. Highest electron affinity |
| B. CCl3NO2 | 2. Chalcogen |
| C. Cl2 | 3. Tear gas |
| D. Sulphur | 4. Storage batteries |
Codes:
| A | B | C | D | |
| 1. | 4 | 3 | 1 | 2 |
| 2. | 3 | 4 | 1 | 2 |
| 3. | 4 | 1 | 2 | 3 |
| 4. | 2 | 1 | 3 | 4 |
Subtopic: Group 16 - Preparation, Properties & Uses |
87%
From NCERT
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Match the compounds given in Column I with the hybridisation and shape given in Column II and mark the correct option.
| Column I | Column II | ||
| A | XeF6 | 1. | sp3d3 distorted octahedral |
| B. | XeO3 | 2. | sp3d2 square planar |
| C. | XeOF4 | 3. | sp3 pyramidal |
| D. | XeF4 | 4. | sp3d2 square pyramidal |
Codes:
| Options: | A | B | C | D |
| 1. | 1 | 3 | 4 | 2 |
| 2. | 1 | 2 | 4 | 3 |
| 3. | 4 | 3 | 1 | 2 |
| 4. | 4 | 1 | 2 | 3 |
Subtopic: Group 18 - Preparation, Properties & Uses |
84%
From NCERT
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