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Q. No.Assertion(A): Ni++ has two unpaired electrons.
Reason(R): Electrons are removed from 3d but not from 4s.
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 and R is false.
4. A and R both are false.
Reason(R): Electrons are removed from 3d but not from 4s.
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 and R is false.
4. A and R both are false.
Subtopic: d-Block Elements- Properties & Uses |
79%
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Given below are two statements:
| Assertion (A): | Cr2+ acts as a reducing agent and Mn3+ acts as an oxidising agent when both have d4 configuration. |
| Reason (R): | The maximum oxidation state Cr show is +5 and Mn shows is +7. |
| 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: d-Block Elements- Properties & Uses |
60%
From NCERT
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| Assertion (A): | The highest oxidation state of osmium is +8 . |
| Reason (R): | Osmium is a 5d-block element. |
| 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: d-Block Elements- Properties & Uses |
66%
From NCERT
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Given below are two statements:
| Assertion (A): | Cu cannot liberate hydrogen from acids. |
| Reason (R): | Because it has positive electrode potential. |
| 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 not True but (R) is True |
| 4. | Both (A) and (R) are False. |
Subtopic: d-Block Elements- Properties & Uses |
89%
From NCERT
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| Assertion (A): | Actinoids form relatively less stable complexes as compared to lanthanoids. |
| Reason (R): | Actinoids can utilise their 5f orbitals along with 6d orbitals in bonding but lanthanoids do not use their 4f orbital for bonding. |
| 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 not True but (R) is True. |
| 4. | Both (A) and (R) are False. |
Subtopic: Lanthanoid & Actinoids Contraction |
From NCERT
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Given below are two statements:
| Assertion (A): | Separation of Zr and Hf is difficult. |
| Reason (R): | Because Zr and Hf lie in the same group of the periodic table. |
| 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 not true but (R) is true |
| 4. | Both (A) and (R) are false. |
Subtopic: d-Block Elements- Properties & Uses |
67%
From NCERT
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| Assertion (A): | \(Cu^{2+}\) iodide is not known. |
| Reason (R): | \(Cu^{2+}\) oxidises \(I^-\) to iodine. |
| 1. | Both (A) and (R) are True, and (R) is the correct explanation of the (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is not True but (R) is True. |
| 4. | Both (A) and (R) are False. |
Subtopic: d-Block Elements- Properties & Uses |
73%
From NCERT
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| Statement I: | Actinoid contraction is greater from element to element than lanthanoid contraction. |
| Statement II: | 5f orbitals have a poorer shielding effect than 4f orbitals. |
| 1. | Statement I is True and Statement II is False. |
| 2. | Statement I is False and Statement II is True. |
| 3. | Both Statement I and Statement II are False. |
| 4. | Both Statement I and Statement II are True. |
Subtopic: Lanthanoid & Actinoids Contraction |
82%
From NCERT
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| Statement I: | Cr2+ is a stronger reducing agent than Fe2+ . |
| Statement II: | Fe2+ is a stronger reducing agent than Cr2+ . |
| 1. | Both Statements I and Statement II are true. |
| 2. | Statement I is true and Statement II is false. |
| 3. | Both Statements I and Statement II are false. |
| 4. | Statement I is false, Statement II is true. |
Subtopic: d-Block Elements- Properties & Uses |
68%
From NCERT
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| Statement 1: | Highest oxidation state of a metal is exhibited in its oxide or fluoride only. |
| Statement 2: | Both oxide and fluoride ions are able to oxidise metals. |
| 1. | Statement 1 is true, Statement 2 is false. |
| 2. | Statement 1 is false, Statement 2 is true. |
| 3. | Both Statements 1 and Statement 2 are true. |
| 4. | Both Statements 1 and Statement 2 are false. |
Subtopic: d-Block Elements- Properties & Uses |
77%
From NCERT
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