pH of Salts

Q.

Is nitric acid an strong acid?

Q. 50 g of common salt is added to 100 g of water at 20 ℃. Observe the solution given below and fill in the blanks. (Solubility of salt in 100 g water is 36 g at 20 ℃)​


a) The salt solution is ___________.

s

R

b) The undissolved salt can be dissolved by _________ the temperature.

C

E

G

c) The undissolved salt can be separated by ___________.​
​

L

R

Q. Which one of the following salts on dissolution in water will give a solution of pH less than 7?

1. $\text{KCN}$
2. ${\text{CH}}_3\text{COONa}$
3. $\text{NaCl}$
4. ${\text{NH}}_4\text{Cl}$

Q. What is a plasma state of matter

Q. $A$ is an aqueous solution of acid and $B$ is an aqueous base. If they are diluted separately, then:

1. $pH$ of $A$ deceases and $pH$ of $B$ decreases till $pH$ in each case is $7$.
2. $pH$ of $A$ increases and $pH$ of $B$ decreases
3. $pH$ of $A$ and $B$ increase.
4. $pH$ of $B$ and $A$ decreases

Q. Salt is the volatile component in the mixture of salt and camphor.

1. True
2. False

Q.

What is the positive ion in sodium sulphate?

1. Sulphide ion

2. Sodium ion

3. Sulphate ion

4. Sulphite ion

Q. 1 L of seawater has a higher concentration of common salt as compared to 1 L of tap water.

1. True
2. False

Q. The diagram represents the preparation of sodium sulphate salt from dilute $H_{2}S{O}_4$ acid and sodium hydroxide. State the reason for conducting the titration using the apparatus $A$ and $B$?

1. To measure volumes of solution accurately
2. Making solution acidic
3. Formation of sodium sulphate
4. To know end point of the reaction

Q. Fill in the missing data in the following table:

Q. Which is the positive ion in sodium sulphate?

1. Sulphide ion
2. Sodium ion
3. Sulphate ion
4. Sulphite ion

Q. From the formula listed below, choose one, in each case corresponding to the salt having the given description:-
$AgCL,CuC{O}_3,CuS{O}_4,5H_{2}O,KN{O}_3,NaCl,NaHS{O}_4,Pb(N{O}_3{)}_2,ZnC{O}_3,ZnS{O}_4,7H_{2}O$
an acid salt

Q. Which of the following substances does not contain acid?

1. Baking soda
2. Vinegar
3. Curd
4. Orange

Q. The pH of a salt formed from an acid 'X' and a base 'Y' is less than 7. X reacts with $BaC{l}_2$ to form precipitates of Barium Sulphate. Among the given options, identify X and Y.

1. X: Hydrochloric acid and
   Y: Ammonium hydroxide
2. X: Sulphuric acid and
   Y: Barium chloride
3. X: Nitric acid and
   Y: Sodium hydroxide
4. X: Sulphuric acid and
   Y: Ammonium hydroxide

Q. Which one of the following salts on dissolution in water will give a solution of pH less than 7?

1. $\text{NaCl}$
2. ${\text{CH}}_3\text{COONa}$
3. ${\text{NH}}_4\text{Cl}$
4. $\text{KCN}$