In water, which of the following creates a colloidal solution?
Important Questions on Matter and its States
What is the role of ultraviolet (UV) radiation in water purification systems?
I. It inactivates/kills the harmful microorganisms in water.
II. It removes all the undesirable odours from the water.
III. It quickens the sedimentation of solid particles, removes turbidity and improves the water's clarity.
Which of the statement(s) given above is/are correct?
Match Column I with Column II and select the correct answer using the codes given below:
| Column I | Column II | ||
| A. | Smoke | 1. | Dispersion of gas in liquid |
| B. | Gel | 2. | Dispersion of solid in solid |
| C. | Emulsion | 3. | Dispersion of liquid in liquid |
| D. | Foam | 4. | Dispersion of liquid in solid |
| 5. | Dispersion of solid in gas |
Codes:
A B C D
Which of the following is/are true when milk changes into curd?
1. It changes color.
2. The change cannot be reversed.
3. It changes the taste.
4. Its state is changed from liquid to semi-solid.
Choose the correct option from below:
Consider the following table:
| Dispersed Phase | Dispersion Medium | Types of Colloid |
| Solid | A | Solid Solution |
| B | Liquid | Emulsion |
| Gas | C | Foam |
A, B and C in the given table are:
When all the components of a mixture are equally distributed, they are called homogeneous mixtures and if they are distributed in different quantity are called heterogeneous. Select homogeneous substances from the following:
I. Salt solution
II. Vinegar
III. Block of wood
IV. Soil
Read the following statements.
1. Gases are soluble in liquids as well as in solids.
2. Gases which form ions in the solvent are soluble in that solvent.
3. Gases which can be liquefied easily are more soluble in water than the other gases which are not liquefied easily.
Which of the statement(s) given above is/are correct?
