The oxo metal anions of the 3d series in which the metal exhibits an oxidation state equal to its group number is /are -

1. VO3-

2. CrO42-

3. MnO4-

4. All of the above.

Subtopic:  d-Block Elements- Properties & Uses |
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The consequence(s) of lanthanoid contraction is/are :  

1. Similarity in the properties of second and third transition series.
2. Separation of lanthanoids is difficult.
3. Variation in the basic strength of lanthanide hydroxides.
4. All of the above.

Subtopic:  Lanthanoid & Actinoids Contraction |
 82%
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The d-block elements that may not be regarded as transition elements are :

1. Mn, Fe, Ni because these have partially filled d-subshell.
2. Mn, Fe, Ni because these have completely filled d-subshell.
3. Zn, Cd, and Hg because these have completely filled d-subshell.
4. Zn, Cd, and Hg because these have partially filled d-subshell.
Subtopic:  d-Block Elements- Properties & Uses |
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What is the electronic configuration of transition elements?

1. \((n-1) d^{1-10} n s^{0-2} \) 2. \((n-1) d^{1-10} n s^2 \)
3. \(n f^2~ n p^{1-6} \) 4. \(n d^2~ n p^{1-6}\)
Subtopic:  d-Block Elements- Properties & Uses |
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The different oxidation states exhibited by the lanthanoids are:

1. +2, -3, +4 2. -2, -3, -4
3. +2, +3, -4 4. +2, +3, +4
Subtopic:  f-Block Elements- Properties & Uses |
 90%
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The "Disproportionation" reaction means that :

1. A relatively less stable oxidation state undergoes an oxidation−reduction reaction.
2. A relatively more stable oxidation state undergoes an oxidation−reduction reaction.
3. A relatively less stable oxidation state undergoes a hydrogenation reaction.
4. A relatively more stable oxidation state undergoes a hydrogenation reaction.
Subtopic:  d-Block Elements- Properties & Uses |
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In the 3d series, a metal with a +1 oxidation state is:

1. Mn 2. Cu
3. Fe 4. Zn
Subtopic:  d-Block Elements- Properties & Uses |
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The number of unpaired electrons in the gaseous ions Mn3+, Cr3+, V3+, and Ti3 are, respectively:

1. 3, 2, 3, and 1 2. 2, 2, 3, and 1
3. 4, 3, 2, and 1 4. 1, 2, 3, and 4
Subtopic:  d-Block Elements- Properties & Uses |
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Alloy that contains lanthanoid metals is-

1. Mischmetal

2. Permalloy

3. Supermalloy

4. Brass

Subtopic:  f-Block Elements- Properties & Uses |
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Give below are some atomic numbers:

29, 59, 74, 95, 102, 104
The atomic numbers of the inner transition elements among the above are :

1. 29, 59, 74

2. 59, 95, 102

3. 95, 102, 104

4. 59, 74, 95
Subtopic:  f-Block Elements- Properties & Uses |
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