The diagonal relationship between $Be$ and $Al$ is due to:

Which of the following oxides is the most acidic?

Which pair of elements has the same chemical properties?

Which of the following sequences correctly represents the decreasing acidic nature of oxides?

Given below are two statements:
Statement $I$: Chlorine can easily combine with oxygen to form oxides,and the product has a tendency to explode.
Statement $II$: Chemical reactivity of an element can be determined by its reaction with oxygen and halogens.
In the light of the above statements,choose the correct answer from the options given below.

Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?