Why does the solution of hydrolysis of Na2B4O7 turn pink on addition of drops of phenolphthalein?

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As cooking food that has to go in the oven

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

Answer(true);