1) Iodine is formed when potassium iodide reacts with a solution of A) $ZnSO_{4}$ B) $CuSO_{4}$ C) $(NH_{4})_{2}SO_{4}$ D) $Na_{2}SO_{4}$ Answer: Option BExplanation:$CuSO_{4}+2Kl \rightarrow Cul_{2}+K_{2}SO_{4}$ $2Cul_{2} \rightarrow 2Cul+l_{2}$ Cuprous iodide
