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Question: Answered & Verified by Expert
Consider the following reactions in which all the reactants and the products are in gaseous state.
2PQP2+Q2;K1=3.6×105
PQ+1/2R2PQR;K2=6×10-3
The value of K3 for the equilibrium
1/2P2+1/2Q2+1/2R2PQR is
ChemistryChemical EquilibriumJEE Main
Options:
  • A 3×103
  • B 6×103
  • C 1.0×10-5
  • D 5×10-3
Solution:
2132 Upvotes Verified Answer
The correct answer is: 1.0×10-5
Given , 2PQP2+Q2
K1=P2Q2[PQ]2=3.6×105
PQ+1/2R2PQR;
K2=[PQR]PQR21/2
=6×10-3
For the required equilibrium
1/2P2+1/2Q2+1/2R2PQR;
K3=[PQR]P21/2Q21/2R21/2
K3=K2×1K1
=6×10-3×13.6×105=6×10-30.6×103
=1×10-5

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