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Of the ions Zn^(2+),Ni^(2+) and Cr^(3+) ...

Of the ions `Zn^(2+),Ni^(2+) and Cr^(3+)` (atomic number Zn=30,Ni=28,Cr=24):

A

only `Zn^(2+)` is colourless ad `Ni^(2+)` and `Cr^(3+)` are coloured.

B

all three are colourless.

C

all three are coloured.

D

only `Ni^(2+)` is coloured and `Zn^(2+) and Cr^(3+)` are colourless.

Text Solution

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The correct Answer is:
A
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RESONANCE ENGLISH-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 2
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  2. Standard reduction electrode potential of Zn^(2+)//Zn is -0.76V. This ...

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  3. Of the ions Zn^(2+),Ni^(2+) and Cr^(3+) (atomic number Zn=30,Ni=28,Cr=...

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  4. which of the following group of ion is paramagnetic in nature:

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  5. which forms interstitial compounds?

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  6. When H(2)O(2) is added to an acidified solution of K(2)Cr(2)O(7)

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  7. Sodium thiosulphate is used in photography because of its:

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  8. What happens when: Ferrous sulphate crystal are heated.

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  9. Which of the following is not an actinoid?

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  10. The correct statement(s) from among the following is/are? (i). all t...

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  11. Which of the following statements is not correct?

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  13. How many of the following show variable oxidation states in their comp...

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  14. Magnetic moment value for a d-block ion is 4.90 BM determine value of ...

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  15. Determine total number of unpaired electrons in following ions Ti^(3...

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  16. A black mineral (A) on heating in presence of air gives a gas (B). (A)...

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  17. What happens when a solution of potassium iodide is added to a solutio...

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  18. KMnO(4)underset(R.A.)overset(H^(+))toMn^(x) KMnO(4)underset(R.A.)ove...

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  19. The no. of electrons satisfying n+l=7 for Lu (atomic number:71)

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  20. Correct statements about transition metals are that they:

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