Question

Which of the following compound is soluble in water?

$1.CuO$

$2.CuC{l}_2$

$3.FeC{O}_3$

Answer 1

$CuC{l}_2$ is soluble in water and forms a green solution of hydrated cupric(II) chloride solution but $FeC{O}_3$ and $CuO$ are not soluble in water.

Hence option 2 is correct.