KCET · Chemistry · Haloalkanes and Haloarenes
Addition of mineral acid to an aqueous solution of Borax, the following compound is formed
- A Boron hydride
- B Orthoboric acid
- C Meta boric acid
- D Pyroboric acid
Answer & Solution
Correct Answer
(B) Orthoboric acid
Step-by-step Solution
Detailed explanation
Addition of mineral acid to an aqueous solution of Borax, orthoboric acid is formed.
\[
\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}+2 \mathrm{HCl}+5 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{H}_{3} \mathrm{BO}_{3}+2 \mathrm{Na}
\]
\[
\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}+2 \mathrm{HCl}+5 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{H}_{3} \mathrm{BO}_{3}+2 \mathrm{Na}
\]
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