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Name an ore each of Cr and Mn....

Name an ore each of Cr and Mn.

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Chromite `(FeCr_(2)O_(4))` , pyrolusite `(MnO_(2))`
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -EXERCISE (VERY SHORT ANSWER-TYPE QUESTIONS)
  1. What are ferrous metals ?

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  2. Give an example of disproportionation reaction.

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  3. Name an ore each of Cr and Mn.

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  4. Why are Zn, Cd and Hg not included among transition elements ?

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  5. The magnetic moment of a metal is sqrt(15)BM. How many unpaired electr...

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  6. In case of transition elements of the first series (from Sc to Cu), wh...

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  7. Name the transition element that has the highest density.

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  8. Which among Fe^(2+) & Fe^(3+) salts have higher magnetic moment ?

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  9. Determine whether Ti^(4+) ion is diamagnetic or paramagnetic.

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  10. Why does V(2)O(5) act as a catalyst ?

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  11. Name the transition element which does not exhibit a variable oxidatio...

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  12. Why does cerium exhibit + 4 oxidation state ?

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  13. Why can't copper replace H(2) from an acid solution ?

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  14. Which is a stronger reducing agent among Cr^(2+) and Fe^(2+) ?

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  15. Why is d^(1) configuration of transition elements highly unstable ?

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  16. Why is the value of E(Cu^(2+)|Cu)^(0)(+0.34V) positive ?

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  17. Standard reduction potential (E^(0)) of Mn^(3+)|Mn^(2+) system is high...

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  18. Why does Mn^(2+) exhibit the highest paramagnetism among the bivalent ...

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  19. What do you obtain if MnO(2) is fused with solid KOH in air ?

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  20. What is the higher oxidation state exhibited by actinoids ?

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