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Pick out the correct statements from the...

Pick out the correct statements from the following
1. Cobalt (III) is more stable in octahedral complexes
2. Zinc forms coloured complexes
3. Most of the d-block elements and their compounds are ferromagnetic
4. Osmium show (VIII) oxidation state
5. Cobalt (II) is more stable in octahedral complexes

A

1 and2

B

1 and 3

C

2 and 4

D

1 and 4

Text Solution

Verified by Experts

Cobalt (III) is much stable in octahedral compelxes and also osmium shows (VIII) oxidation state.
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PRADEEP-D- AND F-BLOCK ELEMENTS-COMPETITIONS FOCUS
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  2. Reason of lanthanoid contraction is

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  3. Which one of the following statements related to lanthanons is incorre...

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  4. All Cu(II) halides are known except the iodide. The reason for it is t...

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  5. In nitroprusside ion, the iron and NO exist as Fe(II) and NO^(+) rathe...

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  6. A red solid is insoluble in water. However, it becomes soluble if some...

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  7. [Fe(H(2)O)(5)NO]^(2+) is a complex formed during the brown ring test f...

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  8. WhenHg(2)Cl(2) ionizes, the ins produced and the unpaired electrons pr...

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  9. Prussian blue is -

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  10. Which one of the following reactions involves disproportionation ?

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  11. Pick out the correct statements from the following 1. Cobalt (III) ...

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  12. Which out of the following belong to 3d-series?

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  13. Transition elements have greater tendency to form complexes because

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  14. The colour of the transition metal ions is due to

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  15. Which of the following show oxidation state of +4 ?

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  16. Potassium manganate (K(2)MnO(4)) is formed when:

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  17. Which of the following statement(s) is (are) correct with reference to...

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  18. Which of the following statement(s) is/are correct when a mixture of N...

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  19. Reduction of the metal centre in aqueous permanganate ion involves

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  20. The correct statement(s) about Cr^(2+) and Mn^(3+) is(are) [Atomic n...

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