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Among the following, the correct statements isA. pH decreases when solid ammonium chloride is added toa a dilute aqueous soplution of `NH_(3)`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 NaOHD. pH decreases when solid sodium oxalate is added to a dilute aqueous solution of oxalic acid |
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Answer» Correct Answer - A Dil aqueous Solutionof `NH_(3)" is "NH_(4)OH` solution `NH_(3)OHhArrNH_(4)^(+)+overset(-)OH` On adding solid ammonium chloride `NH_(4)rarrNH_(4)^(+)+Cl^(-)` The reaction moves backward due to common ion effect. The concentration of `OH^(-)` decreases and pH decressess. |
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