Which of the following metal cation oxides is not amphoteric?

Which one of the following oxides is ionic?

Assertion $(A)$: $CuI_2$ cannot be prepared by the reaction of $Cu^{2+}_{(aq)}$ with $I^{-}_{(aq)}$.
Reason $(R)$: Aqueous $Cu^{2+}$ solution is blue in colour.
The correct answer is:

In which of the following, ions are correctly arranged in the increasing order of oxidizing power?

Which of the following is the correct order of acidic character?

When an excess of $KI$ is added to a $CuSO_4$ solution and then $Na_2S_2O_3$ is added to the mixture,which of the following statements is incorrect?