Which of the following cannot be used as an antacid for the treatment of acidity?

What is the percentage of $H_{2}SO_{4}$ in dilute sulfuric acid (in $\%$)?

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

If $1$ mole of salt is dissolved in $2$ liters of salt solution,what is the concentration of the solution (in $;M$)?

What happens when nitric acid is added to an egg shell?

What happens when a solution of an acid is mixed with a solution of a base in a test tube?
$(i)$ The temperature of the solution increases
$(ii)$ The temperature of the solution decreases
$(iii)$ The temperature of the solution remains the same
$(iv)$ Salt formation takes place