Q. No.Four statements for Cr and Mn are given below:
(I)
Cr2+ and Mn3+ have the same electronic configuration.
(II)
Cr2+ is a reducing agent while Mn3+ is an oxidizing agent.
(III)
Cr2+ is an oxidizing agent while Mn3+ is a reducing agent.
(IV)
Both Cr and Mn are oxidizing agents.
The correct statements are
1. (I), (III),(IV)
2. (I) , (II)
3. (I), (II) and (IV)
4. (I), (IV)
Match the following characteristics to the appropriate metal:
| Column I - Aspects | Column II - Metal | ||
| (a) | The metal which reveals the maximum number of oxidation states | (i) | Scandium |
| (b) | The metal although placed in 3d block is considered not as a transition element | (ii) | Copper |
| (c) | The metal which does not exhibit variable oxidation states | (iii) | Manganese |
| (d) | The metal which in +1 oxidation state in aqueous solution undergoes disproportionation | (iv) | Zinc |
Select the correct option :
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (iv) | (ii) | (iii) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iii) | (i) | (iv) | (ii) |
| 4. | (ii) | (iv) | (i) | (iii) |
Match the compounds/elements given in Column I with uses given in Column II.
| Column (Compound/element) |
Column II (Use) |
||
| A. | Lanthanoid oxide | 1. | Petroleum cracking |
| B. | Lanthanoid | 2. | Television screen |
| C. | Mischmetal | 3. | Lanthanoid metal + iron |
| D. | Mixed oxides of lanthanoids are employed |
4. | Production of iron alloy |
Codes
| Options: | A | B | C | D |
| 1. | 2 | 1 | 4 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2 | 4 | 3 | 1 |
| 4. | 4 | 1 | 3 | 2 |
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 |
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 is |
1. +2 2. +3 |
|
B. Most stable oxidation state of Mn is |
3. +4 |
|
C. Most stable oxidation state of Mn in oxides is |
4. +5 |
|
D. Characteristic oxidation state of lanthanoids is |
5. +7 |
Codes
| 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 |
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 |
Codes
| 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 |
Assertion (A) C iodide is not known.
Reason (R) C oxidises to iodine.
1. Both assertion and reason are true, and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of assertion.
3. Assertion is not true but the reason is true.
4. Both assertion and reason are false.
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. |
Assertion: Actinoids form relatively less stable complexes as compared to lanthanoids.
Reason: 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. |
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. |
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