Q1. Which of the following is the precipitate in the given reaction? \(Na_2SO_4\,(aq) + BaCl_2\,(aq) \to BaSO_4\,(s) + 2NaCl\,(aq)\)
A \(Na_2SO_4\,(aq)\)
B \(BaSO_4\,(s)\) Correct
C \(BaCl_2\,(aq)\)
D \(NaCl\,(aq)\)
Explanation
A precipitate is the insoluble solid formed during a reaction. In the equation, \(BaSO_4\) is marked \((s)\), meaning it is a solid, so barium sulphate is the precipitate. \(Na_2SO_4\) and \(BaCl_2\) are written as \((aq)\), so they are aqueous reactants dissolved in water. \(NaCl\) is also written as \((aq)\), so it remains dissolved in the solution. The state symbol, not just the compound name, identifies the precipitate here.