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प्रश्न
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
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उत्तर
Milk is a colloidal solution but vinegar is a true solution.
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संबंधित प्रश्न
Differentiate between an atom and a molecule.
Define the following term of Atom .
A kind of matter which can sublime is
When a crystal of potassium permanganate is placed in a beaker, its purple colour spreads throughout the water. What does this observation tell us about the nature of potassium permanganate and water?
What is meant by saying that metals are lustrous ?
Fill in the following blanks with suitable words :
The elements which are sonorous are called ..........................
Name a metal which has a low melting point.
A, B and C are all liquids. Liquid A has a comparatively low boiling point. On heating, liquid A vaporises completely without leaving behind any residue. Liquid A is being used increasingly as a fuel in motor vehicles either alone or by mixing with petrol. Liquid B has a very high boiling point. It also vaporises completely on heating, without leaving any residue. Liquid B is a conductor of electricity and used in making thermometers. Liquid C has a moderate boiling point. On heating, liquid C vaporises leaving behind a white solid D which is used in cooking vegetables. The condensation of vapours from C give a liquid E which turns anhydrous CuSO4 to blue.
(a) Which liquid could be an element ? Name this element.
(b) Which liquid could be a mixture ? Name this mixture.
(c) Which liquid could be a compound ? Name this compound.
(d) What could the solid D be ?
(e) What do you think is liquid E ?
If 25 mL of acetone is present in 150 mL of its aqueous solution, calculate the concentration of solution.
What is the difference between colloids and suspensions ?
State whether the following statement are true or false :
Alcohol can be separated from a mixture of alcohol and water by a separating funnel.
Name the source from which nitrogen and oxygen are obtained on a large scale.
Name the process which can be used to recover salt from an aqueous salt solution.
Name the process by which all the dye can be recovered from black ink.
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 common salt, sulphur powder and sand ?
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
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The arrangement of particles in three different phases of matter is shown above.
- Which state is represented by Fig. 1?
- In which state will the inter-particle attraction be maximum?
- Which one of them cannot be contained in an open vessel?
- Which one can take the shape of its container?
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 |
Solid is an arrangement of particles ______.
Define the term matter.
