The inner transition element is not represented by the atomic
number among 59, 74, 95, 102, and 104.

1. 59

2. 95

3. 102

4. 104

Subtopic:  Lanthanoid & Actinoids Contraction |
 69%
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Which of the following is the correct order of second ionization energy?

1. V > Cr > Mn

2. V < Cr < Mn

3. V < Cr > Mn

4. V > Cr < Mn

Subtopic:  d-Block Elements- Properties & Uses |
 72%
From NCERT
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Dimethyl glyoxime in a suitable solvent was refluxed for 10 minutes with pure pieces of nickel sheet, it will result in

1. Red precipitate

2. Blue precipitate

3. Yellow precipitate

4. No precipitate

Subtopic:  d-Block Elements- Properties & Uses |
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While Fe3+ is stable, Mn3+ is not stable in acidic solution because

1. O2 oxidises Mn2+ to Mn3+

2. O2 oxidises both Mn+2 to Mn+3 and Fe2+ to Fe3+

3. Fe3+ oxidises H2O to O2

4. Mn3+ oxidised H2O to O2

Subtopic:  d-Block Elements- Properties & Uses |
 56%
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The incorrect statement about Re-Re bonding in [Re2X8]2- is

(1) Re-Re bond length is abnormally short

(2) Re-Re bond is comprised of one σ, two π and one δ bond

(3) If Re-Re bond points along z-axis, then square planar ReX4 unit will use s, px, py and dx2-y2 orbitals for the formation of four Re-X σ bonds

(4) dxy orbitals will overlap to form δ-bond

Subtopic:  d-Block Elements- Properties & Uses |
 68%
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Choose the correct statement regarding bonding in FeCl3 at high temperature?

(I) It contains 2c-2e- bond

(II) It contains 3c-2e- bond

(III) It contains a co-ordinate bond

1. (I), (II)

2. (I), (III)

3. (II), (III)

4. (I), (II) & (III)

Subtopic:  d-Block Elements- Properties & Uses |
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 Given lanthanoid ions ,the tendency to form the complexes is highest for:

1. Ce+3

2. Pm+2

3. Lu+3

4. Eu+2

Subtopic:  f-Block Elements- Properties & Uses |
 53%
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The fusion of chromite ore (FeCr2O4) with Na2CO3 in air gives a yellow solution upon the addition of water. Subsequent treatment with H2SO4 produces an orange solution.

The yellow and orange colours, respectively, are due to the formation of:

1. Na2CrO4 and Na2Cr2O7

2. Cr(OH)3 and Na2Cr2O7

3. Cr2(CO3)3 and Fe2(SO4)3

4. Cr(OH)3 and Na2CrO4

Subtopic:  Chemistry of Mn and Cr Compounds |
 84%
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Which of the following statements is false? 

1. V2+ < Cr2+ < Mn2+ < Fe2+ : Paramagnetic behaviour
2. Ni2+ < Co2+ < Fe2+ < Mn2+ : Ionic size
3. Co3+ < Fe3+ < Cr3+ < Sc3+ : Stability in aqueous solution
4. Sc < Ti < Cr < Mn : Number of oxidation states

Subtopic:  d-Block Elements- Properties & Uses |
 66%
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A substance is found to have a magnetic moment of 3.9 B.M. The ion may be 

1. Fe+3

2. Mn+2

3. Co+2

4. Cu+2

Subtopic:  d-Block Elements- Properties & Uses |
 75%
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