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प्रश्न
State your observations when Dilute Hydrochloric acid is added to Sodium thiosulphate.
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उत्तर
Dil. HCl reacts with thiosulphates to produce sulphur dioxide and yellow sulphur is precipitated.
Na2S2O3 + 2HCl → 2NaCl + H2O + SO2 + S ↓
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