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Chemistry · EQUILIBRIUM

हिन्दी

Given below are statements regarding physical equilibria: (A) Equilibrium is possible only in a closed system at a given temperature. (B) Both opposing processes occur at the same rate and there is a dynamic but stable condition. (C) All measurable properties of the system remain constant. (D) When equilibrium is attained for a physical process, it is characterised by constant value of one of its parameters at a given temperature. (E) Liquid-vapour equilibrium can be established in both open and closed systems. Choose the correct answer from the options given below:

  1. (A), (C) and (E) only
  2. (A), (B), (C) and (D) only
  3. (B), (D) and (E) only
  4. (A), (B) and (E) only

Correct answer · Option 2

(A), (B), (C) and (D) only

Explanation

Physical equilibrium requires a closed vessel because in open systems molecules escape and equilibrium cannot be reached; hence (E) is incorrect while (A), (B), (C), and (D) are all correct characteristics.

Related questions

Given below are two statements:\n Statement I: Chemical equilibrium can be attained from either direction, whether starting with pure reactants or pure products.\n Statement II: The Law of Chemical Equilibrium and Law of Mass Action was proposed by Cato Maximillian Guldberg and Peter Waage in 1864. \nIn the light of the above statements, choose the most appropriate answer from the options given below:→For a 0.10 M aqueous solution of a diprotic acid \( \text{H}_2\text{X} \), the ionization constants are \( K_{a_1} = 4.0 \times 10^{-5} \) and \( K_{a_2} = 1.6 \times 10^{-11} \). The concentration of divalent anion \( [\text{X}^{2-}] \) at equilibrium is:→When \( \text{HCl} \) gas is passed through a saturated solution of \( \text{NaCl} \), pure \( \text{NaCl} \) precipitates out while impurities like \( \text{MgSO}_4 \) and \( \text{Na}_2\text{SO}_4 \) remain dissolved. The underlying reason for this phenomenon is:→In the equilibrium \( \text{Fe}^{3+}(\text{aq}) + \text{SCN}^-(\text{aq}) \rightleftharpoons [\text{Fe}(\text{SCN})]^{2+}(\text{aq}) \) (deep red), what happens to the red colour intensity upon the addition of oxalic acid \( (\text{H}_2\text{C}_2\text{O}_4) \) and why?→
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