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Question
Colemanite is:-
Options
\[\ce{Na2 B4O7 10H2O}\]
\[\ce{Na2 B6 O11 5H2O}\]
\[\ce{Na BO2}\]
\[\ce{H3 BO4}\]
MCQ
Solution
\[\ce{Na2 B6 O11 5H2O}\]
Explanation:
Calumniate is ore of boron with formula \[\ce{Na2 B6 O11 5H2O}\].
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