Advertisements
Advertisements
प्रश्न
There is a large group of materials P which can be divided into three groups Q, R and S on the basis of their properties. The substances belonging to group Q can be solids, liquids or gases. The solids belonging to group Q are usually electrical insulators. Most of the substances of group R are solids which are good conductors of electricity. The substances belonging to group S are neither insulators like Q nor good conductors like R. The properties of S are intermediate between those of Q and R.
- What could the group of materials P be ?
- Name the substances Q. Give two examples of such substances.
- Name the substances R. Write two examples of such substances.
- Name the substances S. Give two examples of such substances.
- Out of Q, R and S, which substances are malleable and ductile ?
Advertisements
उत्तर
- Group of materials P is element.
- Q is a non-metal. Examples: Carbon(s), and bromine (l)
- R is a metal, as most of them are good conductors of heat and electricity. Examples: Copper, and aluminum
- S is a metalloid, as they have intermediate properties of those of metals and non-metals. Examples: Arsenic, and antimony
- R is a metal, therefore, it is malleable and ductile.
APPEARS IN
संबंधित प्रश्न
The inter-molecular force is maximum in
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
Fill in the blank
All matter is made up of tiny particles called ______
State two characteristics of matter demonstrated by Brownian motion.
Which of the following are not compounds ?
Chlorine gas, Potassium chloride, Iron powder, Iron sulphide, Aluminium foil, Iodine vapour, Graphite, Carbon monoxide, Sulphur powder, Diamond
Which of the two will scatter light : soap solution or sugar solution ? Why ?
Name the process by which the various gases of the air are separated.
Fill in the following blanks with suitable words :
If a mixture contains iron filings as one of the constituents, it can be separated by using a .......................
How will you separate a mixture of iron filings, chalk powder and common salt ?
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
The correct increasing order of the boiling points of liquid oxygen, liquid argon and liquid nitrogen present in liquid air is :
What's the solution?
We need to rub salt on a corncob, but only salt crystals are available.
Asmita went to buy an earthen pot. There she saw many things kept for sale.
From what substance has the potter made all the things?
The particles in the matter are extremely small and can be seen even with a powerful microscope.
Match the physical quantities given in column A to their S I units given in column B:
| (A) | (B) | ||
| (a) | Pressure | (i) | cubic metre |
| (b) | Temperature | (ii) | kilogram |
| (c) | Density | (iii) | pascal |
| (d) | Mass | (iv) | kelvin |
| (e) | Volume | (v) | kilogram per cubic metre |
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
Atoms are tiny particles that repel each other when they are squeezed very close.
Higher the temperature, the higher the kinetic energy of particles.
The pressure of gases does not depend on the temperature of the gas and the volume it occupies.
Define the term matter.
