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प्रश्न
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
विकल्प
True
False
उत्तर
False. Because alcohol is separated from the mixture of alcohol and water by distillation.
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संबंधित प्रश्न
Name the terms for the particles of matter which may or may not have independent existence.
Name two processes which provide the best evidence for the motion of particles in matter.
Explain why, osmosis can be considered to be a special kind of diffusion. Classify the following into
(i) osmosis, and (ii) diffusion :
- swelling up of a raisin on keeping in water
- spreading of virus on sneezing
- earthworm dying on coming in contact with common salt
- shrinking of grapes kept in thick sugar syrup
- preserving of pickles in salt
- spreading of smell of cake being baked in the kitchen
- aquatic animals using oxygen dissolved in water during respiration
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?
Which of the following are compounds ?
- CO
- No
- NO
- Co
Out of a colloid, solution and a suspension :
which one has the smallest particles ?
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
How will you differentiate between a suspension and a colloid ?
What is a suspension ? Give two examples of suspensions.
Name the process you would use to separate a mixture of water and alcohol.
How would you obtain sodium chloride from a mixture of sodium chloride and sulphur without using water ?
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
One of the following does not undergo sublimation. This one is :
There are three liquids A, B and C, all having different densities and different boiling points. Liquids A and C are organic in nature whereas liquid B is considered to be inorganic. When liquids A and B are put together in a container, they form a single layer. On the other hand, when, liquids B and C are mixed, they form two separate layers :
(a) Which process will you use to separate a mixture of A and B ?
(b) Which method will you use to separate a mixture of B and C ?
(c) Name the liquids which would behave like (i) A (ii) B and (iii) C.
A solid mixture contains four constituents P, Q, R and S. P consists of tiny grains and it is mixed with
cement for plastering the walls. Q is a white solid which is recovered on a large scale from sea water by the
process of evaporation. R is in the form of tiny particles of a material whose corrosion is called rusting. And
S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
- How would you separate a mixture containing P, Q, R and S ?
Explain the meaning of the term matter with special reference to the term ‘substance’.
Which among the following is not a matter?
Intermolecular space is maximum in ______.
Solid is an arrangement of particles ______.
Define the term matter.
