Advertisements
Advertisements
प्रश्न
Define Aerosol Give one example.
Advertisements
उत्तर
Aerosol- Aerosol is a colloid in which a solid or liquid is dispersed in a gas. Examples are hairspray and fog.
APPEARS IN
संबंधित प्रश्न
The smallest unit of matter that exists freely in nature is called ...........
What is the scientific name of particles which make up mater?
Explain why steel is used to make railway lines.
Define matter. Give four examples of matter.
What is the general name of the materials which contain at least two pure substances and show the properties
of their constituents ?
What are the two types of pure substances? Give one example of each type.
What is the other name for impure substances ? Give two examples of impure substances.
Which of the following substances are elements ?
Water, Salt, Mercury, Iron, Marble, Diamond, Wood, Nitrogen, Air, Graphite, Hydrogen, Oxygen, Sugar, Chlorine
Name a metal which is yellow in colour.
Define solute.
What is a colloid ? Give two examples of colloids (or colloidal solutions)
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How will you separate water from mustard oil ?
Tincture of iodine is a mixture of two materials X and Y. The material Y has a property that its solid form can be converted directly into vapours on heating by a process called Z.
- What could X be ?
- What could Y be ?
- Name the process Z.
- Which process would you use to recover both the components X and Y from tincture of iodine ?
- Which process can be used to recover only component Y from tincture of iodine ?
Explain the meaning of the term matter with special reference to the term ‘substance’.
The non S I and S I units of some physical quantities are given in column A and column B respectively. Match the units belonging to the same physical quantity:
| (A) | (B) | ||
| (a) | degree celsius | (i) | kilogram |
| (b) | centimetre | (ii) | pascal |
| (c) | gram per centimetre cube | (iii) | metre |
| (d) | bar | (iv) | kelvin |
| (e) | milligram | (v) | kilogram per metre cube |
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
Higher the temperature, the higher the kinetic energy of particles.
______ is used for industrial refrigeration and transporting frozen food.
Define the term matter.
