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The pH of a 0.001 M NaOH will be

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The pH of a 0.001 M NaOH will be
A. 3
B. 2
C. 11
D. 12
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Correct Answer - C
0.001 M of NaOH means `[OH^(-)] = 0.001`
`= 10^(-3) M rArr pOH = 3`
`pH + pOH = 14 rArr pH = 14-3 = 11`.
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