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InterviewSolution
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Among the following, the correct statement is(a) pH decreases when solid ammonium chloride is added to a dilute aqueous solution of NH3(b) pH decreases when solid sodium acetate is added to a dilute aqueous solution of acetic acid(c) pH decreases when solid NaCl is added to a dilute aqueous solution of NaOH(d) pH decreases when solid sodium oxalate is added to a dilute aqueous solution of oxalic acid |
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Answer» Answer is : (a) pH decreases when solid ammonium chloride is added to a dilute aqueous solution of NH3 Dil.aqueous solution of NH3 is NH4OH. NH4OH ⇌ NH4+ + OH- On adding solid ammonium chloride NH4Cl → NH4+ + Cl- The reaction moves backward due to common ion effect. The concentration of OH− decreases and hence the pH decreases. |
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