Question

Assertion (A) Lead nitrate on thermal decomposition gives lead oxide, brown coloured nitrogen dioxide and oxygen gas. Reason (R): Lead nitrate reacts with Potassium iodide to form yellow ppt of lead iodide and the reaction is double displacement as well as precipitation reaction.

Radhika performed the reaction between Potassium iodide and Lead nitrate and observed a yellow solid.

Assertion (A) : In the reaction, Na2SO4 + BaCl2 → BaSO4 + 2NaCl, sodium chloride is precipitated. Reason (R) : When an aqueous solution is added to another aqueous solution, an insoluble substance is formed, which is called precipitate.

Trupti mixes an aqueous solution of sodium sulphate (Na₂SO₄) and an aqueous solution of copper chloride (CuCl₂). Will this lead to a double displacement reaction? Justify your answer.