HgCl2 and I2 both when dissolved in water containing I- ions the pair of species formed is

(a) HgI2I3-                              (b) HgI2, I-

(c) HgI42-, I3-                             (d) Hg2I2, I-

Subtopic:  d-Block Elements- Properties & Uses | Chemistry of Mn and Cr Compounds |
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 |
 63%
From NCERT
NEET - 2016
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Which one of the following statements is correct when SO2 is passed through acidified

K2Cr2O7 solution?

1. The solution is decolourized

2. SO2 is reduced

3. Green Cr2(SO4)3 is formed

4. The solution turns blue

Subtopic:  Chemistry of Mn and Cr Compounds |
NEET - 2016
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The correct electronic configuration of Gadolinium(Atomic number = 64)  is :

1. [Xe]4f86d2                   

2. [Xe]4f95s1

3. [Xe]4f75d16s2                   

4. [Xe]4f65d26s2

Subtopic:  f-Block Elements- Properties & Uses |
 86%
From NCERT
NEET - 2015
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Assuming complete ionisation, same moles of which of the following compounds will

require the least amount of acidified KMnO4 for complete oxidation?

1. FeSO4

2. FeSO3

3. FeC2O4

4. Fe(NO2)2

Subtopic:  d-Block Elements- Properties & Uses |
NEET - 2015
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The reason for lanthanoid contraction is:

1. Negligible screening effect of 'f' orbitals

2. Increasing nuclear charge

3. Decreasing nuclear charge

4. Decreasing screening effect

Subtopic:  Lanthanoid & Actinoids Contraction |
 73%
From NCERT
NEET - 2014
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A diamagnetic lanthanoid ion among the following is :

(At. numbers:  Ce = 58, Sm = 62, Eu = 63, Yb = 70)

1. Ce2+

2. Eu2+

3. Sm2+

4. Yb2+

Subtopic:  d-Block Elements- Properties & Uses |
 53%
From NCERT
NEET - 2013
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Among the following, the incorrect statement regarding interstitial compounds is:

1. They retain metallic conductivity.

2. They are chemically reactive.

3. They are much harder than the pure metal.

4. They have higher melting points than the pure metal.

Subtopic:  d-Block Elements- Properties & Uses |
 77%
From NCERT
NEET - 2013
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Identify the mixture of metals that contain a non-metal as a constituent in it.

1. lnvar

2. Steel

3. Bell metal

4. Bronze

Subtopic:  d-Block Elements- Properties & Uses |
 51%
From NCERT
NEET - 2012
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Which of the statements is not true?

1. On passing H2S through acidified K2Cr2O7 solution, a milky colour is observed

2. Na2Cr2O7 is preferred over K2Cr2O7 in volumteric analysis

3. K2Cr2O7 solution in acidic medium is orange

4. K2Cr2O7 solution becomes yellow on increasing the pH beyond 7

Subtopic:  Chemistry of Mn and Cr Compounds |
 56%
NEET - 2012
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