From which of the following reactions can anhydrous $MgCl_2$ be prepared?

Which of the following is different from the other three oxides?

Which one of the following compounds is a peroxide?

Given below are two statements:
Statement $I$: Both $CaCl_2 \cdot 6H_2O$ and $MgCl_2 \cdot 8H_2O$ undergo dehydration on heating.
Statement $II$: $BeO$ is amphoteric whereas the oxides of other elements in the same group are acidic.
In the light of the above statements,choose the correct answer from the options given below:

Beryllium shows a diagonal relationship with Aluminum. Which of the following similarities is incorrect?

Which of the following statements is false?