Aqueous solution or sodium carbonate extract of the salt is acidified with acetic acid . On addition of lead acetate solution to it, a white precipitate is formed. This indicates the presence of:
A
NO−3
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B
SO2−4
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C
CO2−3
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D
S2−
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Solution
The correct option is BSO2−4 Sulphate ions give white precipitate of lead sulphate when aqueous solution or sodium carbonate extract is neutralised with acetic acid is treated with lead acetate solution Na2SO4+(CH3COO)2Pb→PbSO4White ppt.+CH3COONa