The number of replaceable $O H^{-}$ ions in a base is called __________.

acidity of a base

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basicity of an acid

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neutral

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hydrolysis

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Solution

The correct option is B acidity of a base
The number of replaceable $O H^{-}$ ions in a base is called Acidity of a base.
Basicity of acid is defined as the no of ionizable hydrogen ( $H^{+}$ ) ions present in one molecule of an acid is called basicity.
Acidity of base is defined as the no of ionizable hydrogen ions ( $O H^{-}$ ) present in one molecule of a base is called acidity.

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O H^{-}

H^{+} a n d O H^{-} i o n s

M g (O H)_{2}

= \frac{M o l e c u l a r w e i g h t}{A c i d i t y}

N H_{3}

O H^{-}

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