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The following are statements regarding sodium carbonate
i) The chemical formula of washing soda is Na₂CO₃.10H₂O
ii) Aqueous solution of sodium carbonate is acidic in nature
iii) The prinicple involved in the preparation of Na₂CO₃ by Solvay process is very low solubility of NaHCO₃.

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i and iii are correct

i and ii are correct

ii and iii are correct

all are correct

answer is A.

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Detailed Solution

Washing sida Na₂CO₃ . 10H₂O [Decahydrate of sodium carbonate]
Na₂CO₃ → 2Na⁺ + CO₃^-2
Na₂CO₃ salt undergoes anionic hydrolysis

large CO_3^{ - 2}; + ;2{H_2}O; to ;{H_2}C{O_3}; + ;2Omathop Hlimits^ circleddash

The aqueous solution of Na₂CO₃ is alkaline (or) basic in nature
Hint: Ions of weak acid & base only undergoes hydrolysis
→ Na₂CO₃ is prepared by solvay process
NH₃ + CO₂ + H₂O → NH₄HCO₃
NH₄HCO₃ + NaCl → NH₄Cl + NaHCO₃

→ Due to the low solubility of NaHCO₃ , it gets precipitated in the reaction of NaCl with NH₄HCO₃

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