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प्रश्न
Milk of Magnesia is :
पर्याय
colloid
a true solution
a homogeneous mixture
a suspension
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उत्तर
suspension
Milk of magnesia is a suspension of magnesium hydroxide in water. It has milk like texture.
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संबंधित प्रश्न
Solids have definite shape and definite volume.
Define matter.
Name two processes which provide the best evidence for the motion of particles in matter.
The best evidence for the existence and movement of particles in liquids was provided by :
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?
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
You are given two liquids, one a solution and the other a compound. How will you distinguish the solution from the compound ?
Which of the following statements are true for pure substances ?
- pure substances contain only one kind of particles
- pure substances may be compounds or mixtures
- pure substances have the same composition throughout
- pure substances can be exemplified by all elements other than nickel
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 ?
Explain what happens when a beam of light is passed through a colloidal solution.
Which one of the following is not a chemical change ?
Define the term matter.
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?
You want to wear your favourite shirt to a party, but the problem is that it is still wet after a wash. What steps would you take to dry it faster?
______ is so hard that it can scratch glass.
Boiling refers to the process by which a substance changes from the liquid to the gaseous state at its ______ point.
Evaporation is always accompanied by ______ in temperature.
Define the term matter.
