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प्रश्न
Fill in the following blank :
Milk is a .................... solution but vinegar is a .................... solution.
उत्तर
Milk is a colloidal solution but vinegar is a true solution.
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संबंधित प्रश्न
Name the terms for the change of a solid into liquid.
Define the following term of Matter .
What is meant by saying that metals are malleable and ductile ?
Classify the following as elements or compounds :
Iron, Iron sulphide, Sulphur, Chalk, Washing soda, Sodium, Carbon, Urea
The elements which normally exist in the liquid state are :
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 ?
How will you test whether a given solution is a colloidal solution ?
How will you differentiate between a suspension and a colloid ?
You have been given a suspension and a solution. How could you tell the difference between them by their appearance ?
The solubility of ammonium chloride in water at various temperatures is given below :
| Temperature | : | 10°C | 20°C | 40°C | 60°C | 80°C |
| Solubility | : | 24 g | 37 g | 41 g | 55 g | 66 g |
What mass of ammonium chloride would be needed to make a saturated solution of ammonium chloride in fifty grams of water at 40°C ?
What type of magnet is fitted on a crane to separate scrap iron objects from a heap of waste materials in factories ?
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
Fill in the following blanks with suitable words :
A heterogeneous mixture of liquid and solid is conveniently separated by...............
How would you separate iodine from a mixture of iodine and common salt ?
Which of the following mixture cannot be separated by using water as the solvent ?
Name the metals that are used in jewellery.
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?
A teabag placed in a cup of hot water will diffuse into the water.
The fluidity of solids: ______.
Examples of foam are ______.
