$10 \,mL$ of a solution of $NaOH$ is found to be completely neutralized by $8 \,mL$ of a given solution of $HCl$. If we take $20 \,mL$ of the same solution of $NaOH$,the amount of $HCl$ solution (the same solution as before) required to neutralize it will be ...... $mL$.

What is the common name of the compound $CaOCl_2$?

Why do acids not show acidic behaviour in the absence of water?

Equal lengths of magnesium ribbons are taken in test tubes $A$ and $B$. Hydrochloric acid $(HCl)$ is added to test tube $A$,while acetic acid $(CH_3COOH)$ is added to test tube $B$. The amount and concentration taken for both the acids are the same. In which test tube will the fizzing occur more vigorously and why?

How is the concentration of hydronium ions $(H_3O^+)$ affected when a solution of an acid is diluted?

Why does dry $HCl$ gas not change the colour of the dry litmus paper?