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Identify a ‘Chemical twin' among the fol...

Identify a ‘Chemical twin' among the following

A

Zr-Ta

B

Nb-Te

C

Hf-Re

D

Nb-Ta

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MODERN PUBLICATION-d-AND f- BLOCK ELEMENTS-EXERCISE
  1. The atomic number of cerium (Ce) is 58. The correct electronic configu...

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  2. The only radioactive element among the lanthanoids is

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  3. Identify a ‘Chemical twin' among the following

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  4. How many grams of potassium dichromate are required to oxidise 20.0 g ...

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  5. Which of the following statement regarding lanthanides is false?

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  6. How is sodium chromate converted into sodium dichromate, in the manufa...

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  7. Identify the metal that forms colourless compounds.

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  8. What is the general molecular formula of the products obtained on heat...

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  9. Choose the wrong statement in the following:

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  10. In aqueous solution, Cr^(2+) is stronger reducing agent than Fe^(2+). ...

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  11. Choose the correct matching of transition metal ion and magnetic momen...

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  12. The bivalent metal ion having maximum paramagnetic behaviour is

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  13. When a brown compound of manganese (A) is treated with HCl it gives a ...

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  14. Why are Mn^(2+) compounds more stable than Fe^(2+) compounds towards o...

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  15. WhenI^(-) is oxidised by MnO4^(-) in alkaline medium, I^(-) converts ...

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  16. Blue solution of CuSO4 on treatment with excess KCN give colourless so...

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  17. Consider a titration of potassium dichromate solution with acidified M...

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  18. Among the following, The coloured compound is

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  19. The complex showing a spin only magnetic moment of 2.82 B.M. is

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  20. The colour of light absorbed by an aqueous solution of CuSO4 is

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