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How is potassium dichromate prepared fro...

How is potassium dichromate prepared from a sample of chromite ore ? Give balanced equations for the chemical reactions involved.

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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(LONG ANSWER QUESTIONS)
  1. A transition element forms alloys with other transition metals easily....

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  2. What are interstitial compounds? Why are such compounds well known for...

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  3. How is potassium dichromate prepared from a sample of chromite ore ? G...

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  4. In the transition element series starting from lanthanun (""(57)La), t...

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  5. Represent by ionic equation, the oxidsing action of MnO4^- both in aci...

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  6. Decide giving reasons which one of the following exhibits the property...

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  7. What are inner transition elements? Decide which of the following atom...

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  8. What is the difference between the electronic configurations of transi...

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  9. Complete the reactions : (i) Na2Cr2O7 + KCl rarr (ii) 2MnO(2) + 4...

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  10. Giving reasons indicate which one of the following would be coloured ?...

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  11. Account for the following statements : (i) Co (ii) is stable in aque...

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  12. Decide giving reason which one of the following pairs has the propert...

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  13. What is lanthanoid contraction? What are the consequences of lanthanoi...

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  14. Why lanthanoids and actinoids are called f-block elements?

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  15. Assign reasons for the following: (a) Ce^(3+) can easily be oxidise...

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  16. Assign reasons for the following: (a) Zn^(2+) salts are white while ...

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  17. Assign reasons for the following : (a) Co^(2+) has higher magnetic ...

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  18. Assign reasons for the following : (b) The ionization energy of 5d e...

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  19. Assign reasons for the following : Write equations for the preparati...

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  20. Assign reasons for the following: Sc^(3+) ion is colourless while Cr...

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