Q. No.Among the following \(V^{3+}, Ti^{2+} , Ni^{2+}, Fe^{2+}, Co^{2+}\) for which spin only magnetic moment > 3, and which can form high spin octahedral complex. Find the sum of unpaired electrons in those complexes.
1. 5
2. 7
3. 9
4. 0
1. 5
2. 7
3. 9
4. 0
Subtopic: d-Block Elements- Properties & Uses |
Level 4: Below 35%
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How many of the following are mixed oxides?
\(\mathrm{Cr}_2 \mathrm{O}_3, \mathrm{Mn}_3 \mathrm{O}_4, \mathrm{Fe}_3 \mathrm{O}_4, \mathrm{Fe}_2 \mathrm{O}_3, \mathrm{~V}_2 \mathrm{O}_4, \mathrm{~Pb}_3 \mathrm{O}_4\)
1. Two
2. Five
3. Three
4. Zero
\(\mathrm{Cr}_2 \mathrm{O}_3, \mathrm{Mn}_3 \mathrm{O}_4, \mathrm{Fe}_3 \mathrm{O}_4, \mathrm{Fe}_2 \mathrm{O}_3, \mathrm{~V}_2 \mathrm{O}_4, \mathrm{~Pb}_3 \mathrm{O}_4\)
1. Two
2. Five
3. Three
4. Zero
Subtopic: d-Block Elements- Properties & Uses |
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An element ‘M’ does not evolve \(H_2\) gas on treatment with dilute HCl. \(MSO_4\) (1 mol) on treatment with excess KCN forms a compound ‘P’. The amount of MS formed (in moles) when \( H_2S\) gas is passed through compound ‘P’ is :
1. 0
2. 1
3. 2
4. 3
1. 0
2. 1
3. 2
4. 3
Subtopic: d-Block Elements- Properties & Uses |
Level 3: 35%-60%
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The oxidation state of ‘Cr’ in the final product formed by reaction between KI and acidified \(K_2Cr_2O_7\) is :
1. +2
2. +6
3. +4
4. +3
1. +2
2. +6
3. +4
4. +3
Subtopic: d-Block Elements- Properties & Uses |
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Level 2: 60%+
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The calculated spin-only magnetic moments of \(\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{OH})_6\right] \text { and } \mathrm{K}_4\left[\mathrm{Fe}(\mathrm{OH})_6\right]\), respectively, are:
| 1. | 4.90 and 4.90 B.M | 2. | 5.92 and 4.90 B.M |
| 3. | 3.87 and 4.90 B.M | 4. | 4.90 and 5.92 B.M |
Subtopic: d-Block Elements- Properties & Uses |
85%
Level 1: 80%+
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Match List-I with List-II.
Choose the correct answer from the options given below:
1. (A)-(IV), (B)-(II), (C)-(III), (D)-(I)
2. (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
3. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
4. (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
| List-I (Types of alloy) |
List-II (Composition) |
||
| (A) | Bronze | (I) | Cu, Ni |
| (B) | Brass | (II) | Fe, Cr, Ni, C |
| (C) | UK silver coin | (III) | Cu, Zn |
| (D) | Stainless Steel | (IV) | Cu, Sn |
Choose the correct answer from the options given below:
1. (A)-(IV), (B)-(II), (C)-(III), (D)-(I)
2. (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
3. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
4. (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
Subtopic: d-Block Elements- Properties & Uses |
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Level 1: 80%+
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Match the transition metal ion in List-I with its corresponding spin-only magnetic moment (in B.M.) in List-II:
Choose the correct answer from the options given below:
1. (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
2. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
3. (A)-(IV), (B)-(II), (C)-(III), (D)-(I)
4. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
| List-I (Transition metal ion) |
List-II (Spin only magnetic moment (B.M.)) |
||
| (A) | \(\mathrm{Ti}^{3+}\) | (I) | 3.87 |
| (B) | \(\mathrm{V}^{2+}\) | (II) | 0.00 |
| (C) | \(\mathrm{Ni}^{2+}\) | (III) | 1.73 |
| (D) | \(\mathrm{Sc}^{3+}\) | (IV) | 2.84 |
Choose the correct answer from the options given below:
1. (A)-(III), (B)-(I), (C)-(II), (D)-(IV)
2. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
3. (A)-(IV), (B)-(II), (C)-(III), (D)-(I)
4. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
Subtopic: d-Block Elements- Properties & Uses |
86%
Level 1: 80%+
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Given below are two statements:
| Statement 1: | \(\mathrm{CrO_3}\) is a stronger oxidizing agent than \(\mathrm{MoO_3}\). |
| Statement 2 | \(\mathrm{CrO_3}\) is more stable than \(\mathrm{MoO_3}\). |
| 1. | Both Statements are correct. |
| 2. | Both Statements are incorrect. |
| 3. | Statement 1 is incorrect and statement 2 is correct. |
| 4. | Statement 1 is correct and statement 2 is incorrect. |
Subtopic: d-Block Elements- Properties & Uses |
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Level 2: 60%+
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Which of the following pairs of ions have an equal number of unpaired electrons?
1. \(\mathrm{V}^{2+}\) and \(\mathrm{Ni}^{2+}\)
2. \(\mathrm{Cr}^{2+}\) and \(\mathrm{Mn}^{2+}\)
3. \(\mathrm{Fe}^{2+}\) and \(\mathrm{Sc}^{2+}\)
4. \(\mathrm{Mn}^{3+} \) and \(\mathrm{Fe}^{2+}\)
1. \(\mathrm{V}^{2+}\) and \(\mathrm{Ni}^{2+}\)
2. \(\mathrm{Cr}^{2+}\) and \(\mathrm{Mn}^{2+}\)
3. \(\mathrm{Fe}^{2+}\) and \(\mathrm{Sc}^{2+}\)
4. \(\mathrm{Mn}^{3+} \) and \(\mathrm{Fe}^{2+}\)
Subtopic: d-Block Elements- Properties & Uses |
73%
Level 2: 60%+
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Which of the following is the correct order of enthalpy of atomization of \(\mathrm{3d-}\)series?
1. \(\mathrm{Ni}>\mathrm{Cu}>\mathrm{Mn}>\mathrm{Zn}\)
2. \(\mathrm{Zn}>\mathrm{Cu}>\mathrm{Mn}>\mathrm{Ni}\)
3. \(\mathrm{Cu}>\mathrm{Mn}>\mathrm{Ni}>\mathrm{Zn}\)
4. \(\mathrm{Mn}>\mathrm{Ni}>\mathrm{Cu}>\mathrm{Zn}\)
1. \(\mathrm{Ni}>\mathrm{Cu}>\mathrm{Mn}>\mathrm{Zn}\)
2. \(\mathrm{Zn}>\mathrm{Cu}>\mathrm{Mn}>\mathrm{Ni}\)
3. \(\mathrm{Cu}>\mathrm{Mn}>\mathrm{Ni}>\mathrm{Zn}\)
4. \(\mathrm{Mn}>\mathrm{Ni}>\mathrm{Cu}>\mathrm{Zn}\)
Subtopic: d-Block Elements- Properties & Uses |
Level 3: 35%-60%
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