Question 4 :
Water of crystallization&#160;is the fixed number of water molecules chemically attached to a&#160;unit of a salt in its crystalline form.<br/>

Question 5 :
In which of the following reactions does conc.${ H }_{ 2 }S{ O }_{ 4 }$ act as an oxidising agent?

Question 7 :
Copper sulphate pentahydrate is commonly called as_______, whereas ferrous sulphate heptahydrate is commonly called as ________ .

Question 8 :
Consider the following statement and select correct option :<br>(l) $K_{sp}$ of $Fe(OH)_3$ in aqueous solution is 3.8 x $10^{38}$ at 298 K. The concentration of $Fe^{3+}$ will increase when $[H^+]$ ion concentration decreases.<br>(ll) In a mixture of $NH_4Cl$ and $NH_4OH$ in water, a further amount of $NH_4Cl$ is added. The pH of the mixture will decreases.<br>(lll) An aqueous solution of each of the following salts $(NH_4l, HCOOK)$ will be basic, acidic respectively.

Question 9 :
Bleaching powder loses ___________ by the action of dilute acids in excess.

Question 11 :
The more commonly used baking powder contains about 30% $NaHCO_3$, 20% $NaAl(SO_4)_2$, 10% $Ca(H_2PO_4)_2$ and 40% starch. Which of the following statements are correct?<br/>

Question 13 :
Baking powder used to make a cake is a mixture of starch, $NaHCO_3$ and $Ca(H_2PO_4)_2$. The function of $Ca(H_2PO_4)_2$ is:<br/>