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P Block Elements question

2024 · 9 Apr · Shift 1 · Q19
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P Block Elements question

2024 · 9 Apr · Shift 1 · Q19

JEE MainChemistryP Block ElementsMCQ+4 / −1
On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed?
  1. A
    Sulphur
  2. B
    Nitric oxide
  3. C
    Lead nitrate
  4. D
    Nitrous oxide
View written solutionFree

Correct answer: D

  1. Identify the reaction type

Lead sulphide is PbS\text{PbS}PbS. Sulphide ions with dilute nitric acid are oxidized, while nitric acid gets reduced.

The known reaction is:

3PbS+8HNO3(dil)→3Pb(NO3)2+2NO+3S+4H2O3\text{PbS} + 8\text{HNO}_3(\text{dil}) \rightarrow 3\text{Pb(NO}_3)_2 + 2\text{NO} + 3\text{S} + 4\text{H}_2\text{O}3PbS+8HNO3​(dil)→3Pb(NO3​)2​+2NO+3S+4H2​O

So the products formed are:

  • Pb(NO3)2\text{Pb(NO}_3)_2Pb(NO3​)2​ = lead nitrate
  • NO\text{NO}NO = nitric oxide
  • S\text{S}S = sulphur
  • H2O\text{H}_2\text{O}H2​O
  1. Check each option

  • A: Sulphur
    Yes, sulphur is formed.

  • B: Nitric oxide
    Yes, NO\text{NO}NO is formed with dilute nitric acid.

  • C: Lead nitrate
    Yes, Pb(NO3)2\text{Pb(NO}_3)_2Pb(NO3​)2​ is formed.

  • D: Nitrous oxide
    No, N2O\text{N}_2\text{O}N2​O is not formed in this reaction.

  1. Conclusion

The substance not formed is:

D: Nitrous oxide\boxed{\text{D: Nitrous oxide}}D: Nitrous oxide​

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