Salts

Q.

What is a neutralization reaction? Give two examples.

Q. A volatile solute can be separated from a non-volatile solvent by evaporation.

1. True
2. False

Q. Smoke is an example of a solid dispersed in liquid medium.

1. True
2. False

Q. What do you mean by the term 'concentration of a solution'? How can we express the concentration of a solution?

Q. Which of the following salts does not belong to the sulphate family?

1. Copper sulphate
2. Sodium sulphate
3. Potassium sulphate
4. Silver nitrate

Q. Salts are formed as a result of ______ .

1. combustion reaction
2. redox reaction
3. neutralization reaction
4. decomposition reaction

Q. Identify the salts pair which contain the same number of ions per molecule.
(i) Aluminium phosphate
(ii) Potassium sulphite
(iii) Barium phosphate
(iv) Magnesium nitride

1. i, iii, iv
2. ii, iv
3. i, iii
4. iii, iv

Q. To make a solution, 36 g of sodium chloride is dissolved in 100 g of water at 293 K. Find its concentration at this temperature. Also, how much sodium chloride in 100 g of water is required is to prepare 12 % m/m solution at same temperature?

Q.

What happens when HCl reacts with magnesium hydroxide?

Q. What do you understand by

(d) Permanent hard water

Q. A substance 'X' releases hydrogen ions and a substance 'Y' releases hydroxide ions in their respective aqueous solution. What will be the products formed if X and Y react with each other?

1. Hydrogen
2. Salt
3. Carbon dioxide
4. Water

Q. The reaction $BaC{l}_2\left(aq\right)+H_{2}S{O}_4\left(aq\right)\to BaS{O}_4\left(s\right)+2HCl\left(aq\right)$ is

Q. The Taj Mahal, an immense mausoleum in Agra is made up of .

1. plaster of paris
2. silica
3. calcium carbonate
4. calcium hydroxide

Q. Which of the following salts does not belong to the sodium family?

1. Sodium carbonate
2. Sodium acetate
   
3. Sodium nitrate
4. Potassium nitrate

Q. Classify the given substances as acidic or basic:
Ammonium hydroxide, Orange, Lemon, Tamarind and Baking soda.

Q. Write the name and formula of an acidic salt.

Q. Why does bleaching powder
(i) Smell strongly of chlorine?
(ii) not dissolve completely in water?

Q. Hydrochloric acid reacts with sodium hydroxide solution to form ______ and water.

1. sodium carbonate
2. sodium chloride
3. oxygen
4. sodium

Q. A solution is prepared by dissolving 50 mL of HCl in 500 mL of water. Identify the concentration of the HCl solution.
(i) 100%
(ii) 9.09%
(iii) 20%
(iv) 10%

Q. $\text{NaOH(aq)}+\text{HCl(aq)}\to$ + ${\text{H}}_2\text{O(l)}$
This is an example of a reaction.

1. $\text{NaCl}$(aq)
2. $\text{NaH}$(s)
3. neutralisation
4. combination

Q. Which solution is more concentrated?
(i) Solution A ( 500 g water + 80 g sugar)
(ii) Solution B (400 g water + 85 g sugar)

Q. Classify the given substances as acidic or basic:
Ammonium hydroxide, Orange, Lemon, Tamarind and Baking soda.

Q. Common name of sodium hydroxide is while for magnesium hydroxide is .

1. plaster of paris
2. lye
3. caustic potash
4. milk of magnesia

Q. Which of the following is a basic salt?

1. ${\text{SnCl}}_2$
2. $\text{NaCl}$
3. $\text{HCl}$
4. ${\text{CH}}_3\text{COONa}$

Q. Maximum of 9.72 g of potassium chloride dissolves in 30 g of water at ${70}^{\circ }$C. The solubility of potassium chloride at ${70}^{\circ }C$ is:

1. 32.4 g
2. 0.324 g
3. 3.24 g
4. 33.4 g

Q.

Which is the correct representation of a neutralisation reaction?

1. $Acid+Base\to salt+water$

2. $A+B\to C$

3. $Compound\stackrel{△}{\to }salt+water$

4. $AB+CD\to AD+CB$

Q. The teacher instructed three students A, B, and C respectively to prepare a 50% (mass by volume) solution of sodium hydroxide (NaOH). ‘A’ dissolved 50 g of NaOH in 100 mL of water, ‘B’ dissolved 50 g of NaOH in 100 g of water while ‘C’ dissolved 50 g of NaOH in water to make 100 mL of solution. Which one of them has made the desired solution?

Q. When carbon dioxide gas is passed through lime water, lime water becomes milky. This is an example of:

1. physical change
2. chemical change
3. reversible change
4. no change

Q. $\text{NaOH(aq)}+\text{HCl(aq)}\to$ + ${\text{H}}_2\text{O(l)}$
This is an example of a reaction.

1. $\text{NaH}$(s)
2. $\text{NaCl}$(aq)
3. neutralisation
4. combination

Q.

Choose the statements from the following, regarding salt:

Statement 1: All salts are formed by the reaction of HCl and NaOH

Statement 2: Salts are formed by the neutralization of acids and bases.

Statement 3: Salts are ionic compounds

Statement 4: Salts are composed of cations and anions

Statement 5: Salts are always white in colour

Statement 6: NaCl is called as common salt

Statement 7: pH of common salt is 7

1. Statement 1, 3 and 6 are correct

2. Statement 1, 3 and 5 are correct

3. Statement 2, 3, 4, 6 and 7 are correct

4. Statement 2, 3 and 6 are correct