Haryana PMT Haryana PMT Solved Paper-2011

  • question_answer
    When solid potassium cyanide is added in water then

    A)  pH will increase

    B)  pH will decrease

    C)  pH will remain the same

    D)  electrical conductivity will not change

    Correct Answer: A

    Solution :

                    Potassium cyanide is the salt of strong base and weak acid, hence when it is added in water then pH will increase. \[KCN+{{H}_{2}}O\underset{\begin{smallmatrix}  strong \\  base \end{smallmatrix}}{\mathop{KOH}}\,+\underset{\begin{smallmatrix}  weak \\  acid \end{smallmatrix}}{\mathop{HCN}}\,\]


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