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Q. No.
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 |
65%
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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 |
80%
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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 |
76%
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| Statement 1: | Silver atom has completely filled d orbitals (4d10) in its ground state. |
| Statement 2: | Silver is not a transition element. |
| 1. | Statement 1 is true , Statement 2 is false. |
| 2. | Statement 1 is false, Statement 1 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 |
66%
From NCERT
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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 |
77%
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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 |
57%
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The graph for (standard electrode potential) is plotted for 3 d series elements below:
The element X is
1. Mn
2. Fe
3. Cu
4. Co
77%
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Consider the graph between enthalpies of atomization of transition elements vs atomic numbers:
The curve representing enthalpies of atomization for 3d series is
1. z
2. y
3. x
4. Cannot predict from the graph
Subtopic: d-Block Elements- Properties & Uses |
73%
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Consider the following graph.
Based on the graph above, it can be concluded that the element with a melting point higher than 3000 K will be:
| 1. | Y | 2. | X |
| 3. | Z | 4. | None of the above |
Subtopic: d-Block Elements- Properties & Uses |
90%
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Match the following:
| Ions | Number of unpaired electrons |
| i. Mn3+ | a. 2 |
| ii. Cr3+ | b. 4 |
| iii. V3+ | c. 1 |
| iv. Ti3+ | d. 3 |
| i | ii | iii | iv | |
| 1. | c | d | b | a |
| 2. | b | d | a | c |
| 3. | d | b | a | c |
| 4. | b | d | c | a |
Subtopic: d-Block Elements- Properties & Uses |
80%
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