Which of the following does not give oxygen on heating?

The orange colour of $K_2Cr_2O_7$ and purple colour of $KMnO_4$ is due to

How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?

The conversion of pig iron to steel frequently requires the addition of
$(I)$ oxygen or iron oxide
$(II)$ transition elements
$(III)$ inner transition elements
$(IV)$ silica

The first transition series metal $M$ has the highest enthalpy of atomisation in its series. One of its aquated ion $(M^{n+})$ exists in green colour. The nature of the oxide formed by the above $M^{n+}$ ion is $:$

Identify the statement which is not correct regarding $CuSO_{4}$.