Treatment of concentrated solution of borax with calculated quantity of sulphu

Question -

Treatment of concentrated solution of borax with calculated quantity of sulphuric acid gives

Options:

A .

H B O_{2}

B .

H_{2} B_{4} O_{7}

C .

H_{3} B O_{3}

D .

B_{2} O_{3}

Answer: Option C
:
C

$N a_{2} B_{4} O_{7} + H_{2} S O_{4} + 5 H_{2} O \to N a_{2} S O_{4} + 4 H_{3} B O_{3}$

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