What is the chemical formula of nitric acid?

What type of oxide is phosphorus pentoxide $(P_4O_{10})$?

$A$ metal $M$ forms an oxide having the formula $M_{2}O_{3}$. It dissolves in both dilute sulphuric acid and dilute sodium hydroxide solution. Identify the metal and write the chemical equations for the reactions involved.

When excess water is added to sodium aluminate and stirred continuously,it undergoes hydrolysis to form white gelatinous precipitates of which substance?

Which process is used to determine the reactivity of a metal?

Which one of the following figures correctly describes the process of electrolytic refining?