Question 12.
Give scientific reasons.
It takes time for pieces of Shahabad tile to disappear in HCl, but its powder disappears rapidly.
Answer:
On addition of dilute HCl in pieces of Shahabad tile, the rate of reaction is very slow. On the other hand, on addition of dilute HCl in powder form of Shahabad tile, the rate of reaction is fast because:
⇒ The rate of reaction depends upon the size of the particles of the reactants.
⇒ Smaller the size of reactant, higher will be its rate of reaction.
⇒ Greater the size of reactant, lesser will be its rate of reaction.
