According to the Arrhenius theory,an acid is a hydrogen-containing compound that produces $..........$ in its aqueous solution.

Which of the following gives the correct increasing order of acidic strength?

An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

Which of the following statements is correct about an aqueous solution of an acid and of a base?
$(i)$ Higher the $pH$,stronger the acid
$(ii)$ Higher the $pH$,weaker the acid
$(iii)$ Lower the $pH$,stronger the base
$(iv)$ Lower the $pH$,weaker the base

Write true or false for the following statement:
On the $pH$ scale,we can measure $pH$ from $0$ (very acidic) to $14$ (very alkaline).

$(i)$ Name the products obtained in the chlor-alkali process.
$(ii)$ Name the gases liberated at the anode and at the cathode,respectively.
$(iii)$ Name the solution which is used as raw material in this process.