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Name the compound that evolves as vapour...

Name the compound that evolves as vapours when NaCl is heated with `K_(2)Cr_(2)O_(7)` and conc. `H_(2)SO_(4)`. Also mention its colour and chemical formula.

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Orange-red vapours of chromyl chloride `(CrO_(2)Cl_(2))` are evolved.
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CHHAYA PUBLICATION-D - AND F - BLOCK ELEMENTS -QUESTION - ANSWER ZONE FOR BOARD EXAMINATION (VERY SHORT ANSWER TYPE)
  1. What is the difference between the numerical values of the successive ...

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  2. Name the element which does not exhibit variable oxidation state in th...

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  3. Name the compound that evolves as vapours when NaCl is heated with K(2...

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  4. The atomic of an element is 102. Show the outer electronic configurati...

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  5. Why are most transition metal ions paramagnetic ?

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  6. In quantitative analysis of Fe^(2+) ions with standard KMnO(4) solutio...

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  7. On reaction with the following compounds, sodium cyanide gives sodium ...

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  8. Name one ore each of chromium and manganese.

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  9. Explain why lanthanoids and actinoids are called f-block elements ?

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  10. Why do Zr(Z = 40) and Hf(Z = 72) have comparable atomic radii ?

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  11. In aqueous solution, which is the most stable oxidation state of titan...

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  12. Name the lightest and the heaviest transition elements.

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  13. Name the largest trivalent ion that exists between lanthanum (Z = 57) ...

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  14. Give one use each of niobium and tantalum.

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  15. Among Fe^(2+) and Fe^(3+), which is more stable ? Why ?

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  16. Which bivalent transition metal ion in the 3d-series is the most param...

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  17. Why is the ionic radius of Fe^(2+) less than that of Mn^(2+) ?

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  18. Name a lanthanoid that exhibits + 4 oxidation state.

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  19. Why is KMnO(4) kept in dark coloured bottles ?

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  20. What happens when the pH of K(2)Cr(2)O(7) solution is increased ? Give...

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