Question 4 :
The solution of bleaching powder in water is always a clear solution.<br/>

Question 7 :
Aquaregia is prepared by mixing conc. $HCl$ and $conc. HNO_3$ in the ratio ________&#160;

Question 10 :
In which of the following reactions does conc.${ H }_{ 2 }S{ O }_{ 4 }$ act as an oxidising agent?

Question 11 :
Which one of the following is present as an active ingredient in bleaching powder for bleaching action?

Question 14 :
For making cake, baking powder is taken. If at home your mother&#160;uses baking soda instead of baking powder in cake,&#160;what is the role of tartaric acid added to baking soda?

Question 16 :
<b></b>Bleaching powder has several uses, some of which are mentioned here. Pick the false one.

Question 17 :
Which of the following solution will have a $pH$ exactly equal to 8?

Question 19 :
A substances A reacts with another substances B to produce the product C and a gas D. If a mixture of the gas D and ammonia is passed through an aqueous solution of C, baking soda is formed. The substances A and B are:

Question 20 :
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 22 :
The $pH$ of a ${ 10 }^{ -9 }\ M$ solution of $HCl$ in water is :<br>

Question 24 :
When ethyl alcohol is heated with a paste of bleaching powder, we get a compound in which the function of bleaching powder is:&#160;

Question 25 :
$NaHCO_{3}$ can be used on its own to make cakes or bread. Baking powder is more commonly used, and contains $NaHCO_{3}$, $Ca(H_{2}PO_{4})_{2}$ and starch. An improved combination baking powder contains about 40% starch, 30% $NaHCO_{3}$&#160;20% $NaAl(SO_{4})_{2}$ and 10% $Ca(H_{2}PO_{4})_{2}$Answer the following questions based on above study.<br/><br/>In improved baking powder, $NaAl(SO_{4})_{2}$ is used for :