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Q. No.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): | 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 |
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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): | 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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| 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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Match the property given in Column-I with the element given in Column-II.
|
Column-I (Property) |
Column-II (Element) |
||
| A. |
Lanthanoid which shows + 4 oxidation state |
1. |
Pm |
| B. |
Radioactive lanthanoid |
2. |
Ce |
| C. |
Lanthanoid which has 4 electronic configurations in +3 oxidation state |
3. |
Lu |
| D. |
Lanthanoid which has 4 electronic configurations in +3 oxidation state |
4. |
Gd |
| Options: | A | B | C | D |
| 1. | 2 | 4 | 1 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2 | 1 | 4 | 3 |
| 4. | 4 | 1 | 3 | 2 |
Subtopic: f-Block Elements- Properties & Uses |
81%
From NCERT
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Match the statements given in Column I with the oxidation states given in Column and mark the correct option.
| Column I | Column II | ||
| A. | Oxidation state of Mn in \(\mathrm{MnO}_2\) is | 1. | +2 |
| B. | Most stable oxidation state of Mn is | 2. | +3 |
| C. | Most stable oxidation state of Mn in oxides is | 3. | +4 |
| D. | Characteristic oxidation state of lanthanoids is | 4. | +5 |
| 5. | +7 |
| Options: | A | B | C | D |
| 1. | 2 | 3 | 4 | 1 |
| 2. | 3 | 1 | 5 | 2 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
Subtopic: Lanthanoid & Actinoids Contraction |
87%
From NCERT
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Match the properties given in Column I with uses given in Column II
| Column I-(Property) | Column II-(Metal) | ||
| A. | An element that can show +8 oxidation state | 1. | Mn |
| B. | 3d block element that can show up to +7 | 2. | Cr |
| C. | 3d block element with the highest melting point | 3. | Os |
| 4. | Fe | ||
| A | B | C | |
| 1. | 3 | 1 | 2 |
| 2. | 1 | 2 | 3 |
| 3. | 1 | 4 | 3 |
| 4. | 4 | 2 | 3 |
Subtopic: d-Block Elements- Properties & Uses |
93%
From NCERT
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Match Compound/element in Column-I with uses in Column-II and select the best match from the codes given:
| Column-I (Compound/element) |
Column-II (Uses) |
||
| A. | Lanthanoid oxide | I. | Petroleum cracking |
| B. | Lanthanoid | II. | Television screen |
| C. | Mischmetal | III. | Lanthanoid metal + iron |
| D. | Mixed oxides of lanthanoids are employed | IV. | Production of iron alloy |
| Options: | A | B | C | D |
| 1. | II | I | IV | III |
| 2. | I | II | III | IV |
| 3. | II | IV | III | I |
| 4. | IV | I | III | II |
Subtopic: Lanthanoid & Actinoids Contraction |
56%
From NCERT
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Match the following :
| Elements | Electronic configuration |
| i. 61 | a. [Rn]5f136d0 7s 2 |
| ii. 91 | b. [Xe]4f56s2 |
| iii. 101 | c. [Rn]5f146d77s2 |
| iv. 109 | d. [Rn] 5f2 6d17s2 |
| i | ii | iii | iv | |
| 1. | b | d | a | c |
| 2. | c | a | d | b |
| 3. | c | d | a | b |
| 4. | a | c | b | d |
Subtopic: d-Block Elements- Properties & Uses |
86%
From NCERT
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