A $0.1\,N $ solution of an acid at room temperature has a degree of ionisation $ 0.1$ . The concentration of $O{H^ - }$ would be

  • A

    ${10^{ - 12}}\,M$

  • B

    ${10^{ - 11}}\,M$

  • C

    ${10^{ - 9}}\,M$

  • D

    ${10^{ - 2}}\,M$

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  • [AIPMT 1999]

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