Which chloride does not exist as hydrate?

Given below are two statements:
Statement $I$: Lithium and Magnesium do not form superoxide.
Statement $II$: The ionic radius of $Li^{+}$ is larger than the ionic radius of $Mg^{2+}$.
In the light of the above statements,choose the most appropriate answer from the options given below:

$Al$ utensils should not be cleaned with materials containing washing soda because .............

Which of the following metal produces $N_2O$ on reaction with $20\%\ HNO_3$?

Explain why is $sodium$ less reactive than $potassium$?

Explain why is sodium less reactive than potassium?