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Q.
An aqueous solution of borax is
AMUAMU 2009
Solution:
Its aqueous solution is alkaline due to hydrolysis.
$Na _{2} B _{4} O _{7}+7 H _{2} O \rightleftharpoons \underset{\text { strong alkali }}{2 NaOH }+\underset{\text { weak acid }}{ N H _{3} BO _{3}}$