Advertisements
Advertisements
Question
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 .......................
Solution
If a mixture contains iron fillings as one of the constituents, it can be separated by using a magnet.
APPEARS IN
RELATED QUESTIONS
Intermolecular space is maximum in .......... less in ............ and the least in .........
The inter-molecular space is maximum in
What do you mean by the inter-molecular spaces? How do they vary in different states of matter?
When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :
The best evidence for the existence and movement of particles in liquids was provided by :
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
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?
Name the property which enables metals to be drawn into wires.
The three important metalloids are.............................. and ..........................
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
Which of the following are compounds ?
- CO
- No
- NO
- Co
Which of the following do not exhibit Tyndall effect ?
Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.
Define solubility of a substance. How does it vary with temperature ?
One of the following represents the solution of solid in a solid. This one is :
Name the process which is used in milk dairies to separate cream from milk.
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
Explain how, impure copper sulphate can be purified by crystallisation.
Gases do not diffuse very easily.
Define the term matter.
