Manipur Board Solutions for Chapter: Acids, Bases and Salt, Exercise 2: Let us answer these

Dissolve a small amount of ${\mathrm{NaHCO}}_3$ in the water. Add 1 drop of methyl orange into it. What is the colour of the mixture?
Add lime water in the above solution till the evolution of the gas stops. What is the colour of the mixture now?

How many grams of sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ will be needed to react completely with a solution containing $10.6 \mathrm{g}$ of sodium carbonate ${\mathrm{Na}}_2{\mathrm{CO}}_3$?