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Q.

Borax dissolves in water to give alkaline solution. The missing chemical in the following equation isNa2B4O7+7H2O→ 2NaOH+.......

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a

4H3BO4

b

4H3BO3

c

4H3BO2

d

4H2BO3

answer is B.

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Detailed Solution

borax dissolves in water to give alkaline solution of sodium hydroxide and orthoboric acid .since orthoboric acid is weak monobasic acid resulting solution is alkaline.Na2B4O7 + 7H2O → 2NaOH + 4H3BO3(orthoboric acid )
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