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प्रश्न
What is the basicity of H3PO4?
उत्तर १
H3PO4 has three ionisable hydrogen atoms. Hence, its basicity is 3.
उत्तर २
\[\ce{H3PO4}\] -
\[\begin{array}{cc}
\ce{O}\\
||\\
\ce{P}\\
/\phantom{...}|\phantom{...}\backslash\\
\ce{HO}\phantom{...}\ce{OH}\phantom{..}\ce{OH}
\end{array}\]
Since there are three OH groups present in H3PO4, its basicity is three i.e., it is a tribasic acid.
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