Advertisements
Advertisements
प्रश्न
Classify the following into metals, non-metals and metalloids:
Silicon, Mercury, Diamond, Sulphur, Iodine, Germanium, Sodium, Carbon, Magnesium, Copper, Boron, Helium
Advertisements
उत्तर
Metals: Mercury, sodium, magnesium, copper
Non-metals: Diamond, sulphur, iodine, carbon, helium
Metalloids: Arsenic, germanium, boron
APPEARS IN
संबंधित प्रश्न
The molecules can move freely anywhere in
Define the term matter. What is it composed of?
What are the conditions for 'something' to be called 'matter'?
Out of solids, liquids and gases, which one has :
- maximum movement of particles ?
- maximum interparticle attractions ?
- minimum spaces between particles ?
When extremely small particles X derived from the anther of a flower were suspended in a liquid Y and observed through a microscope, it was found that the particles X were moving throughout the liquid Y in a very zig-zag way. It was also observed that warmer the liquid Y, faster the particles X moved on its surface.
- What could particles X be ?
- What do you think liquid Y is ?
- What is the zig-zag movement of X known as ?
- What is causing the zig-zag movement of particles X ?
- Name the scientist who discovered this phenomenon.
- What does this experiment tell us about the nature of liquid Y?
What is meant by saying that metals are sonorous ?
What are the two types of pure substances? Give one example of each type.
State any two properties for believing that aluminium is a metal.
Name a metal which has no fixed shape.
Choose the correct answer.
A 15% alcohol solution means :
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution
Fill in the following blanks with suitable words :
The separation of liquids by fractional distillation is based on the difference in their .....................
Pure copper sulphate can be obtained from an impure sample by the process of :
One of the following does not undergo sublimation. This one is :
What's the solution?
We need to make a sherbet quickly for some guests. But we only have sugar candy in the house.
The particles in the matter are extremely small and can be seen even with a powerful microscope.
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 |
Define the term matter.
