Mn2+ compounds are more stable than Fe2+ compounds towards oxidation in their +3 state because :

1. 3d5 configuration is more stable than 3d6 configuration.
2. 3d6 configuration is more stable than 3d5 configuration.
3. 3p5 configuration is less stable than 3p6 configuration.
4. 3p6 configuration is less stable than 3p5 configuration.

Subtopic:  d-Block Elements- Properties & Uses |
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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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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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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 |
 63%
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The electronic configuration of the last element of actinoids is :

1. Thorium, Th: Rn5f146d17s2

2. Lawrencium, Lr: Rn5f146d17s2

3. Neptunium, Np: Rn5f146d17s2

4. Protactinium, Pa: Rn5f146d17s2

Subtopic:  f-Block Elements- Properties & Uses |
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The correct statement regarding Ag is 

1. It is a hard metal.
2. It is not a transition element.
3. It has a partially filled d orbital in a +2 oxidation state. Thus, it is a transition element.
4. None of the above

Subtopic:  d-Block Elements- Properties & Uses |
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The enthalpy of atomization of transition metals is high due to :

1. High effective nuclear charge

2. A large number of valence electrons

3. Very strong metallic bonds

4. All of the above

Subtopic:  d-Block Elements- Properties & Uses |
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The transition metals generally form coloured compounds due to :

1. Absorption of radiation to promote an electron .
2. Presence of ligands, the d-orbitals split up into two sets of orbitals.
3. Energy required to promote an electron in d subshell is low.
4. All of the above.

Subtopic:  d-Block Elements- Properties & Uses |
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Transition metals and their many compounds act as good catalysts due to :

1. Variable oxidation states 2. Unstable intermediate
3. Provide a suitable surface 4. All of the above
Subtopic:  d-Block Elements- Properties & Uses |
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Transition metals show paramagnetic behaviour due to:

1. Paired electrons in the (n-1) d-orbitals 2. Unpaired electrons in the (n-1) d-orbitals
3. Due to \(d^{10},\) and ​​​​​​​\(d^{0}\) configuration 4. None of the above

Subtopic:  d-Block Elements- Properties & Uses |
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