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If the hand or any portion of the body...

If the hand or any portion of the body comes in contact with white phosphous, it should be washed with copper sulphate solution - why ?

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Why should copper sulphate solution not be kept in an iron vessel?

State with equations, what happens when (any five) : (7) Al powder is added to copper sulphate solution.

Explain why-(a) A green layeris formed on the surface of copper which is left exposed in moist air for a long period. (b) blue colour of the copper sulphate solution is discharged slowly when an iron rod is dipped in it. (c) Galvanised irono is not used as a fondstuff container.

CHHAYA PUBLICATION-P-BLOCK ELEMENTS-PRACTICE SET 7 (ANSWER THE FOLLOWING QUESTIONS) : -
  1. If the hand or any portion of the body comes in contact with whit...

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  2. Why does R(3) P = O exist but R(3) N = O does not (R = alkyl grou...

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  3. H(2)S is acidic but H(2) O is neutral in nature - why ?

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  4. Fluorine cannot be prepared by oxidation of F^(-) ion - explain.

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  5. Interhalogen compounds are more reactive than halogen - why ?

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  6. Most of the noble gas compounds are by formed by xenon - why ?

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  7. Why is the group to which the noble gases belong termed as zero gr...

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  8. NH(3) is a better complexing agent than PH(3) - why ?

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  9. Why N(2) is chemically very inert at room termpreature ?

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  10. During manufacture of H(2)SO(4) by contact process, why is SO(3) n...

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  11. Which oxofluoride of xenon is octahedral ?

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  12. HF is weaker acid than HI. Explain.

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  13. Phosphours shows greater tendency for catenation than nitrogen .E...

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  14. Hydrolysis of XeF(6) is not a redox reaction - explain.

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  15. KHF(2) exists while KHCI(2), KHBr(2),KHI(2) do not - Why ?

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  16. Though nitrogen exhibits + 5 oxidation state is cannot form pen...

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  17. Bleaching by SO(2) is not premanent but that of Cl(2) is permane...

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  18. Write down the order of oxidising power of the oxoacids of chlor...

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