Which of the following will not give a positive chromyl chloride test?

(1) CuCl2

(2) ZnCl2

(3) HgCl2

(4) NH4Cl

Subtopic:  d-Block Elements- Properties & Uses |
 54%
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What is the n-factor ratio when KMnO4 reacts with conc. HCl?

(1) 3:4

(2) 8:1

(3) 16:1

(4) 2:1

Subtopic:  Chemistry of Mn and Cr Compounds |
 53%
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Which of the following can not exist together in aqueous solution?

(1) HgCl2 and SnCl2

(2) HgCl2 and SnCl4

(3) SnCl4 and FeCl3

(4) SnCl4 and PbCl4

Subtopic:  d-Block Elements- Properties & Uses |
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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 |
 77%
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When an excess of KCN is added to a solution of CuSO4, the final product obtained is :

1. K2[Cu(CN)4]

2. K3[Cu(CN)4]

3. CuCN

4. K[Cu(CN)2]

Subtopic:  Introduction, Classification and Nomenclature |
 57%
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Which of the following atomic numbers is not the atomic number of the inner transition element: 29, 59, 74, 95, 102, 104?

(1) 59

(2) 95

(3) 102

(4) 104

Subtopic:  Lanthanoid & Actinoids Contraction |
 60%
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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 |
 67%
From NCERT
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When dimethyl glyoxime is subjected to reflux with pure nickel sheet pieces in an appropriate solvent for 10 minutes, what is the outcome?

(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+ oxidises H2O to O2

Subtopic:  d-Block Elements- Properties & Uses |
 55%
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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 |
 61%
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