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Equilibrium — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryEquilibrium1 Mark
MCQ
Note : In the following questions a statement of Assertion $(A)$ followed by a statement of Reason $(R)$ is given. Choose the correct option out of the choices given below each question.
Assertion $(A)$ : The ionisation of hydrogen sulphide in water is low in the presence of hydrochloric acid.
Reason $(R)$ : Hydrogen sulphide is a weak acid.
  • A
    $A$ and $R$ both are correct, and $R$ is the correct explanation of $A.$
  • ✓
    $A$ and $R$ both are correct, but $R$ is not the correct explanation of $A$.
  • C
    $A$ is true but $R$ is false.
  • D
    $A$ and $R$ both are false.
✓

Answer

Correct option: B.
$A$ and $R$ both are correct, but $R$ is not the correct explanation of $A$.
In presence of $H^{+}$ ion, equilibrium shifts in backward direction.

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