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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
The molecules can move freely anywhere in
Differentiate between an atom and a molecule.
Fill in the blank :
The substances which can flow are called ________
What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain during Brownian motion.
Name one solid, one liquid and one gaseous non-metal.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Name a non-metal :
- which is lustrous
- which is required for combustion
- whose one of the allotrophic forms is a good conductor of electricity. Name the allotrope.
- other than carbon which shows allotropy
- which is known to form the largest number of compounds
One of the following substances is neither a good conductor of electricity nor an insulator. This substance is :
On the basis of composition of matter, milk is considered to be :
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 ?
What is the name of the clear liquid formed when a solid dissolves in a liquid ?
State whether the following statement is true or false :
Sponge is an example of solid sol.
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
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.
Name the source from which nitrogen and oxygen are obtained on a large scale.
How will you separate a mixture containing sand and sugar ?
Describe the various steps involved in the separation of iodine, iron filings and salt from a mixture.
Which of the following cannot be separated from air by the process of fractional distillation ?
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?
Gases do not diffuse very easily.
