Based on the Physical State of the Solute and the Solvent

Q.

A metal carbonate X on reacting with acid and gives a gas which when passed through a solution Y gives the carbonate back. On the other hand, a gas G that is obtained at the anode during electrolysis of brine is passed on dry Y, and it gives a compound Z, used for disinfecting drinking water. Identity X, Y, G, and Z.

Q.

Which of the following are examples of aerosol?

1. Smoke

2. Smoke and fog

3. Milk

4. Fog

Q.

Explain with suitable examples. (i) Alcosol (ii) Aerosol (iii) Hydrosol?

Q. Choose the products that are formed when magnesium oxide reacts with hydrochloric acid.

1. Magnesium hydroxide and oxygen
2. Magnesium chloride and carbon dioxide
3. Magnesium chloride and water
4. Magnesium hydroxide and water

Q.

Salt S is prepared by reacting dilute sulphuric acid with copper oxide. Identify S?

Q. Which of the following solids is insoluble in water?

1. Coffee powder
2. Salt
3. Sand
4. Sugar

Q. When calcium reacts with dilute hydrochloric acid, it results in the formation of a salt X along with the evolution of a gas Y. Identify X and Y from the following:

(a) $X:Ca(OH{)}_2,Y:C{l}_2$
(b) $X:CaC{l}_2,Y:H_2$
(c) $X:Ca(OH{)}_2,Y:H_2$
(d) $X:CaC{l}_2,Y:C{l}_2$

Q.

In the following reactions, $\mathrm{ZnO}$ is respectively acting as a/an:

(a) $\mathrm{ZnO}+{\mathrm{Na}}_2\mathrm{O}\to {\mathrm{Na}}_2{\mathrm{ZnO}}_2$

(b) $\mathrm{ZnO}+{\mathrm{CO}}_2\to {\mathrm{ZnCO}}_3$.

1. Acid and acid

2. Acid and base

3. Base and acid

4. Base and base

Q. Nitrogen in air can be considered a solvent in which all other gases are dissolved.

1. False
2. True

Q. Which among the following is an example of gel?

1. Cheese
2. Smoke
3. Milk
4. Fog