Which of the following is not a strong acid?

$(a)$ State in tabular form the name of the acid and base from which the following salts are formed. Also,mention the nature of the salt,whether it is acidic or basic?
$(i)$ Sodium acetate.
$(ii)$ Ammonium sulphate.

How is an aqueous solution with $pH = 2$ compared to an aqueous solution with $pH = 4$?

Melittin present in the bite of honeybee is a polypeptide containing $......$ amino acids.

What happens to the $pH$ of a basic aqueous solution if the concentration of $[OH^-]$ ions increases?

Which of the following is(are) true when $HCl(g)$ is passed through water?
$(i)$ It does not ionise in the solution as it is a covalent compound.
$(ii)$ It ionises in the solution.
$(iii)$ It gives both hydrogen and hydroxyl ion in the solution.
$(iv)$ It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule.