Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II
and select  the correct match:

Column I Column II
A. Co3+  i. √8 B.M.
B. Cr3+ ii. √35 B.M.
C. Fe3+ iii. √15 B.M.
D. Ni2+ iv. √24 B.M.
 
A B C D
1. iv iii ii i
2. i ii iii iv
3. iv i ii iii
4. iii iv i ii

Subtopic:  d-Block Elements- Properties & Uses |
 74%
From NCERT
NEET - 2018
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When copper is heated with conc. HNO3 it produces:

1. Cu(NO3) and NO

2. Cu(NO3)2, NO and NO2

3. Cu(NO3)2 and N2O

4. Cu(NO3)2 and NO2

Subtopic:  d-Block Elements- Properties & Uses |
 59%
From NCERT
NEET - 2016
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The electronic configurations of Eu (Atomic no. 63), Gd (Atomic no. 64), and Tb (Atomic no. 65) are, respectively:
1. [Xe] 4f5d6s2, [Xe]4f5d6s2, and [Xe] 4f6s2
2. [Xe] 4f5d6s2, [Xe] 4f75d1 6s2, and [Xe]4f5d6s2
3. [Xe] 4f6s2, [Xe]4f7 5d6s2, and [Xe] 4f9 6s2
4. [Xe] 4f6s2, (Xe]4f6s2, and [Xe]4f8 5d6s2
Subtopic:  f-Block Elements- Properties & Uses |
 67%
From NCERT
NEET - 2016
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SO2 is passed through an acidified K2Cr2Osolution.
The correct statement among the following regarding the above experiment is:

1. The solution gets decolorized.

2. SO2 gets reduced.

3. Green coloured Cr2(SO4)3 gets formed.

4. The solution turns blue.

Subtopic:  Chemistry of Mn and Cr Compounds |
 55%
From NCERT
NEET - 2016
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Which of the following ions displays the d-d transition and paramagnetism?
1. \(\mathrm{CrO}_4^{2-} \) 2. \(\mathrm{Cr}_2 \mathrm{O}_7^{2-} \)
3. \(\mathrm{MnO}_4^{-} \) 4. \(\mathrm{MnO}_4^{2-}\)
Subtopic:  d-Block Elements- Properties & Uses |
 61%
From NCERT
NEET - 2018
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The reason for a greater range of oxidation states in actinoids is attributed to:

1. Actinoid contraction

2. 5f, 6d and 7s levels having comparable energies.

3. 4f and 5d levels being close in energies.

4. The radioactive nature of actinoids

Subtopic:  d-Block Elements- Properties & Uses |
 71%
From NCERT
NEET - 2017
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Zinc can be coated on iron to produce galvanised iron, but the reverse is not possible because:

1. Zinc is lighter than iron.
2. Zinc has a lower melting point than iron.
3. Zinc has a lower negative reduction potential than iron.
4. Zinc has a higher negative reduction potential than iron.

Subtopic:  d-Block Elements- Properties & Uses |
 61%
From NCERT
NEET - 2016
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HgCl2 and I2 both, when dissolved in water containing I- ions the pair of species formed is:

1. HgI2, I-

2. HgI42-, I3-

3. Hg2I2, I-

4. HgI2, I3-

Subtopic:  d-Block Elements- Properties & Uses | Chemistry of Mn and Cr Compounds |
 56%
NEET - 2017
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A gas that can readily decolorize an acidified KMnO4 solution is:

1. SO2

2. NO2

3. P2O5

4. CO2

Subtopic:  d-Block Elements- Properties & Uses | Chemistry of Mn and Cr Compounds |
 73%
From NCERT
NEET - 2017
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The incorrect statement regarding the lanthanons is ;

1. Europium shows +2 oxidation state
2. The basicity decreases as the ionic radius decreases from Pr to Lu
3. All the lanthanons are much more reactive than aluminium
4. Ce (+4) solutions are widely used as oxidising agents in volumetric analysis
Subtopic:  f-Block Elements- Properties & Uses |
 62%
From NCERT
NEET - 2016
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