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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-D & F-BLOCK ELEMENTS & THEIR IMPORTANT COMPOUNDS -Exercise 2
  1. Match the compounds of column X with oxidation state of central atom i...

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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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  5. Which forms interstitital compouds?

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

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  8. High increase in population is due to:

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  9. Which of the following is not an actinide?

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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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  12. Total number of 3d-series transition elements contain either 3d^(1) or...

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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. An element of I^(st) transition series X^(+3) have highest magnetic mo...

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  17. Chromite ore is processed through the following sequence In this ...

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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 transiton metals are that they:

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