Water was taken in four beakers labeled as I to IV. To these beakers the following substances were added. Beaker (1) Common salt (1) Alum (III) Potassium nitrate (IV) A few drops of barium chloride and a few drops of dilute sulphuric acid. After sometime, the contents of the beakers were filtered. The contents of which beaker will leave residue on the filter paper.
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beaker IV will leave the residue of barium chloride on the filter paper
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The contents of the beaker that will leave residue on the filter paper are (IV) A few drops of barium chloride and a few drops of dilute sulphuric acid.
- The reaction between a few drops of barium chloride and a few drops of dilute sulphuric acid is a precipitation reaction or double displacement reaction.
- In most cases, double displacement reactions occur in aqueous solutions, where the ions precipitate and an ion exchange occurs.
- In this reaction, Barium sulphate is formed as a precipitate. Hence, the content of the IV beaker will leave residue on the filter paper.
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