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Assertion : Zn^(2+) and Cu^(2+) are colo...

Assertion : `Zn^(2+)` and `Cu^(2+)` are colourless. Reason : Both `Zn^(2+)` and `Cu^(2+)` contain 3d-filled subshell.

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Ions of Zn^(2+) and Ti^(4+) are colourless while Cu^(2+) and Ni^(2+) are coloured . Why ?

Out of Cu^(2+) and Cu^(+) ion, which one is colourless and why?

Assertion : Cu^(2+) ion is a coloured ion . Reason : Every ion with unpaired electron is coloured .

Assertion : Cuprous salts are diamagnetic. Reason : Cu has 3d-filled subshell.

Assertion : Cu^(2+) iodide is not known. Reason : Cu^(2+) oxidises I^- to iodine.

Why Zn^(2+) salts are colourless and Ni2+ salts are coloured?

Which of the Zn^(2+) , Sc^(3+) and Co^(2+) are expected to be coloured and why ?

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. Assertion : FeCl3 reacts with KCNS to give blood red colouration. Re...

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  2. Sodium chloride is used to clear snow from roads. Explain.

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  3. Assertion : Zn^(2+) and Cu^(2+) are colourless. Reason : Both Zn^(2+) ...

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  4. Assertion : There is a continuous decrease in size among lanthanoids. ...

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  5. Assertion : Lanthanoids show a limited number of oxidation states wher...

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  6. Pt^(4+) is less/more stable than Ni^(4+) .

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  7. Match the element in Column I with the property mentioned in Column II

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  8. Find x in the following figures.

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  9. The answer to each of the following questions is a single- digit-integ...

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  10. The number of electrons present in the 4f-subshell of Gd (Z = 64) is

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  11. Write the iupac name of the compound : Li[Al H4]

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  12. The number of paramagnetic ions among Ti^(3+), Cr^(3+), Ti^(4+), Fe^(2...

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  13. The magnetic moment of a transition metal ion is found to be 4.90 BM. ...

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  14. The oxidation number of Mn in the product of alkaline oxidative fusion...

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  15. In neutral or faintly alkaline solution, 8 moles of permanganate anion...

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  16. Electronic configuration of a transition element X in +3 oxidation s...

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  17. The electronic configuration of Cu (II) is 3d^9 whereas that of Cu (I)...

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  18. Complete the following:

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  19. Generally transition elements form coloured salts due to the presence ...

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  20. On addition of small amount of KMnO4 to concentrated H2SO4, a green oi...

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