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NEETChemistryChemical Equilibrium

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): For the reaction 2 SO _ 2( g ) + O _ 2( g ) 2 SO _ 3( g ) , the ratio K_p K_c decreases as temperature increases. Reason (R): For this reaction, the number of moles of gaseous products is greater than the number of moles of gaseous reactants ( n_g > 0 ). In the light of the above statements, choose

Options

  1. ABoth Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. BBoth Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. CAssertion is true but Reason is false.
  4. DAssertion is false but Reason is true.

Correct answer

C. Assertion is true but Reason is false.

Step-by-step solution

For the given reaction 2 SO _ 2( g ) + O _ 2( g ) 2 SO _ 3( g ) : n_g = ( moles of gaseous products ) - ( moles of gaseous reactants ) n_g = 2 - (2 + 1) = -1 Since n_g The relationship between K_p and K_c is: K_p = K_c( RT )^ n_g K_p K_c = ( RT )⁻¹ = 1 RT As temperature ( T ) increases, the value of RT increases, which causes the ratio 1 RT to decrease. Therefore, the ratio K_p K_c decreases with an increase in temperature. Thus, the Assertion (A) is true. Hence, Assertion is true but Reason is false. Answer: Asser

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