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Write equations for the preparation of `K_2Cr_2O_7` from chromite ore.

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Write balanced chemical equations for the preparation of SO_2 from a sulfite and sulfide ores.

Thermal decomposition of K_2Cr_2O_7 produces:

Write the balanced redox reaction for titration of K_(2)Cr_(2)O_(7) Vs Ferrous ammonium sulphate.

Indicate the steps in the preparation of: (i). K_2Cr_2O_7 from chromite ore. (ii). KMnO_4 from pyrolusite ore

State any four uses of K_2Cr_2O_7 .

Which of the following properties is/are common to both K_2Cr_2O_7 & KMnO_4 ?

Give the preparation of K_2Cr_2O_7 , from chromite ore. Give its any five oxidising properties.

Which of the following is not formed when H_(2)S reacts acidic K_(2)Cr_(2)O_(7) solution ?

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ICSE-d- AND- f- BLOCK ELEMENTS-EXERCISE (PART-II) (DESCRIPTIVE QUESTIONS)(LONG ANSWER QUESTIONS)
  1. Assign reasons for the following : (a) Co^(2+) has higher magnetic ...

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

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

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

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  5. Why are Mn^(2+) compounds more stable than Fe^(2+) towards oxidation t...

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  6. Assign reasons for the following: Cu(I) compounds are white and diam...

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  7. Assign reasons for the following: Why is the chemistry of all lantha...

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  8. Assign reasons for the following: What is lanthanoid contraction ? E...

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  9. How and you account for the following : (i) Cabalt (II) is stable in...

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  10. Why Sm^(2+) , Eu^(2+) and Yb^(2+) ions are good reducing agents , but ...

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  11. Compare the properties of lanthanoids and actinoids.

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  12. Given below are the electrode potential values, E^(Theta) for some of ...

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  13. Complete the following chemical reaction equations : (i) Cr(2)O(7)^(...

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  14. Decribe the general trends in the following properties of the first se...

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  15. Assign reasons for each of the following (i) Trasitiono elements exh...

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  16. (a) Complete the following chemical reaction equations : (i) MnO(4(a...

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  17. Explain the following observations about the transition/ inner-transit...

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  18. Complete the follwing chemical equations for reactions : (i) Fe^(@+...

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  19. Give an explanation for each of the following observations: (i) The...

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  20. Complete the follwing chemical equations for reactions : (i) Fe^(@+...

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