{:(Column A ,Column B),((1) CuSO_(4),(a) Pale green),((2)FeSO_(4),(b)Blue),((3) Na_(2)SO_(4) ,(c) White),((4)BaCl_(2),(d)Milky white):}
{:(Column A ,Column B),((1) CuSO_(4),(a) Pale green),((2)FeSO_(4),(b)Blue),((3) Na_(2)SO_(4) ,(c) White),((4)BaCl_(2),(d)Milky white):}