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

Give suitable reasons for the following statements: An aqueous solution of sodium chloride is neutral,but an aqueous solution of sodium is basic.

If $1$ mole of glucose is dissolved in $500 \; mL$ of glucose solution,what is the molarity of the solution (in $; M$)?

Which of the following phenomena occur when a small amount of acid is added to water?
$(i)$ Ionisation
(ii) Neutralisation
(iii) Dilution
(iv) Salt formation

How would you distinguish between baking powder and washing soda by heating?

Equal lengths of magnesium ribbon are taken in two test tubes $A$ and $B$. $H_{2}SO_{4}$ is added to test tube $A$ and $H_{2}CO_{3}$ in test tube $B$ in equal amounts.
$(a)$ Identify the test tube showing vigorous reaction.
$(b)$ Give reason to support your answer.
$(c)$ Name the gas liberated in both the test tubes. How will you prove its liberation?