A weak base \( M \mathrm{OH} \) of \( 0.1 \mathrm{~N} \) concentration shows a pH value of 9 . W...

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A weak base \( M \mathrm{OH} \) of \( 0.1 \mathrm{~N} \) concentration shows a pH value of 9 . What is the percentage degree of ionization of the base?
(a) \( 0.01 \% \)
(b) \( 0.001 \% \)
(c) \( 0.1 \% \)
(d) \( 0.02 \% \)
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