Q. No.Which of the following ions is the strongest oxidizing agent?
(Given: Atomic Number of Ce = 58, Eu = 63, Tb = 65, Lu = 71]
(Given: Atomic Number of Ce = 58, Eu = 63, Tb = 65, Lu = 71]
| 1. | \(\mathrm{Lu}^{3+}\) | 2. | \(\mathrm{Eu}^{2+}\) |
| 3. | \(\mathrm{Tb}^{4+}\) | 4. | \(\mathrm{Ce}^{3+}\) |
Subtopic: f-Block Elements- Properties & Uses | Lanthanoid & Actinoids Contraction |
58%
Level 3: 35%-60%
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How many of the following elements do not belong to the Lanthanoids?
\(\mathrm{Eu}, \mathrm{Er}, \mathrm{Lu}, \mathrm{Cm}, \mathrm{Yb}, \mathrm{Tb}\)
1. 5
2. 4
3. 3
4. 1
\(\mathrm{Eu}, \mathrm{Er}, \mathrm{Lu}, \mathrm{Cm}, \mathrm{Yb}, \mathrm{Tb}\)
1. 5
2. 4
3. 3
4. 1
Subtopic: f-Block Elements- Properties & Uses |
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The best reducing agent among the given ions is:
1. \(\text{Ce}^{4+}\)
2. \( \text{Gd}^{2+}\)
3. \( \text{Lu}^{3+}\)
4. \(\text{Nd}^{3+}\)
1. \(\text{Ce}^{4+}\)
2. \( \text{Gd}^{2+}\)
3. \( \text{Lu}^{3+}\)
4. \(\text{Nd}^{3+}\)
Subtopic: f-Block Elements- Properties & Uses |
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Which of the following statement is correct?
1. \(\mathrm{Ce}^{4+}\) is an oxidising agent
2. \(\mathrm{Ce}^{4+}\) is a reducing agent
3. \(\mathrm{Ce}^{3+}\) has a noble gas configuration
4. \(\mathrm{Ce}\) has a stable configuration
1. \(\mathrm{Ce}^{4+}\) is an oxidising agent
2. \(\mathrm{Ce}^{4+}\) is a reducing agent
3. \(\mathrm{Ce}^{3+}\) has a noble gas configuration
4. \(\mathrm{Ce}\) has a stable configuration
Subtopic: f-Block Elements- Properties & Uses |
73%
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Which of the following f-block metals have a half-filled f-subshell?
(a) Samarium (Sm)
(b) Gadolinium (Gd)
(c) Europium (Eu)
(d) Terbium (Tb)
[Atomic numbers : Sm = 62, Eu = 63, Gd = 64, Tb = 65]
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (c)
(a) Samarium (Sm)
(b) Gadolinium (Gd)
(c) Europium (Eu)
(d) Terbium (Tb)
[Atomic numbers : Sm = 62, Eu = 63, Gd = 64, Tb = 65]
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (c)
Subtopic: f-Block Elements- Properties & Uses |
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Which of the following lanthanide have half-filled and fully filled f-orbital respectively?
1. Eu2+, Tb3+
2. Yb3+, Tb2+
3. Gd3+, Yb2+
4. Sm2+, Dy2+
1. Eu2+, Tb3+
2. Yb3+, Tb2+
3. Gd3+, Yb2+
4. Sm2+, Dy2+
Subtopic: f-Block Elements- Properties & Uses |
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Which of the following f-block elements is most stable in the bivalent oxidation state?
1. Sm
2. Eu
3. Tb
4. Ce
1. Sm
2. Eu
3. Tb
4. Ce
Subtopic: f-Block Elements- Properties & Uses |
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The most common oxidation state of Lanthanoid elements is \(+3.\) Which of the following is likely to deviate easily from \(+3\) oxidation state?
1. \(\text{Ce}\)(At. No. 58)
2. \(\text{La}\)(At. No. 57)
3. \(\text{Lu}\)(At. No. 71)
4. \(\text{Gd}\)(At. No. 64)
1. \(\text{Ce}\)(At. No. 58)
2. \(\text{La}\)(At. No. 57)
3. \(\text{Lu}\)(At. No. 71)
4. \(\text{Gd}\)(At. No. 64)
Subtopic: f-Block Elements- Properties & Uses |
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Which of the following pairs of ions of lanthanoids corresponds to half-filled and completely filled 'f' orbitals respectively, based on their electronic configurations? [Given: Atomic no. \(\mathrm{Eu, 63; Sm, 62; Tm, 69; Tb, 65; Yb, 70; Dy, 66]}\)
1. \(\mathrm{Eu^{2+}}\) and \(\mathrm{Tm^{2+}}\)
2. \(\mathrm{Sm^{2+}}\)and \(\mathrm{Tm^{3+}}\)
3. \(\mathrm{Tb^{4+}}\) and \(\mathrm{Yb^{2+}}\)
4. \(\mathrm{Dy^{3+}}\) and \(\mathrm{Yb^{3+}}\)
1. \(\mathrm{Eu^{2+}}\) and \(\mathrm{Tm^{2+}}\)
2. \(\mathrm{Sm^{2+}}\)and \(\mathrm{Tm^{3+}}\)
3. \(\mathrm{Tb^{4+}}\) and \(\mathrm{Yb^{2+}}\)
4. \(\mathrm{Dy^{3+}}\) and \(\mathrm{Yb^{3+}}\)
Subtopic: f-Block Elements- Properties & Uses |
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Which of the following statements is correct about cerium(IV), given that it attains a noble gas configuration?
1. It will not prefer to undergo redox reactions.2. It will prefer to gain an electron and act as an oxidizing agent
3. It will prefer to give away an electron and behave as a reducing agent
4. It acts as both an oxidizing and a reducing agent.
Subtopic: f-Block Elements- Properties & Uses |
68%
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