100 ml of mixture of NaOH and Na₂CO₃is titrated against 0.1M HCl solution. When titration started by adding phenolphthalein indicator, end point observed at 20 ml of HCl. But when titration started by adding methyl orange indicator, end point observed at 25 ml of HCl. Correct statement(s) about the initial mixture taken is/are

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In one litre of original initial mixture 0.6g of NaOH present.

In one litre of original initial mixture 530mg of Na₂CO₃ present.

Molarity of NaOH in the initial mixture is 0.015M.

To neutralize only Na₂CO₃ in 100 ml of mixture 5 ml of 0.2M H₂SO₄ is required.

answer is B, C, D.

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