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Which metal is used to reduce Cr^(3+) io...

Which metal is used to reduce `Cr^(3+)` ion? Why?

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A stable `Cr^(3+)` ion, strong reducing agent which has high negative value for reduction potential like metallic zinc (`E^(0)= -0,76 V`) is required. Metallic zinc is a powerful reducing agent due to its large negative values.
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FULL MARKS-TRANSITION AND INNER TRANSITION ELEMENTS-Additional Questions (VIII. Two Mark Questions.)
  1. Copper is unique in 3d series. Prove this statement.

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  2. Define - Standard electrode potential.

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  3. Which metal is used to reduce Cr^(3+) ion? Why?

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  4. Sc^(3+), Ti^(4+), V^(5+) are diamagnetic. Give reason.

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  5. Calculate the magnetic moment of Ti^(3+) and V^(4+).

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  6. Cr^(3+), Mn^(4+), V^(2+) are paramagnetic. Calculate their magnetic mo...

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  7. Mn^(2+), Fe^(3+) have high magnetic moment. Prove it.

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  8. How many unpaired electrons are present in Co^(3+), Fe^(2+)? Calculate...

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  9. Calculate the magnetic moment and the number of unpaired electrons in ...

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  10. Cu^(+), Zn^(2+) are diamagnetic. Prove it.

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  11. Most of the transition metals act as catalyst. Justify this statement.

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  12. Explain the catalytic hydrogenation of alkene to alkane with equation.

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  13. Which catalyst is used in the hydroformylation of olefins? Give equati...

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  14. Which catalyst is used in the conversion of acetaldehyde to acetic aci...

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  15. What is Zeigler -Natta catalyst? In which reaction it is used? Give eq...

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  16. d-block elements readily form complexes. Give reason.

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  17. Prove that acidified potassium dichromate is a powerful oxidising agen...

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  18. What are the uses of potassium dichromate?

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  19. Draw and explain about the structure of permanganate ion.

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  20. Explain the action of heat on potassium permanganate.

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