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JEE Main Chemistry question

ChemistryEquilibriumJEE Main

When 20 g of CaCO₃ were put into 10 litre flask and heated to 800°C, 35% of CaCO₃ remained unreacted at equilibrium. Kp for decomposition of CaCO₃ is:

Answer: (A)

Solution

n(CO₂)=0.65×0.2=0.13 mol. T=1073K. P=nRT/V=0.13×0.0821×1073/10=1.145 atm.

Question ID VK-136100