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प्रश्न
Define solute.
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उत्तर
Solute is a substance, which is dissolved in a liquid to prepare a solution.
Examples: Sugar, salt etc.
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संबंधित प्रश्न
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Give one difference between atoms and molecules.
What are the two types of pure substances? Give one example of each type.
Define a compound. Give two points of evidence to show that sodium chloride is a compound.
What are (i) metals (ii) non-metals, and (iii) metalloids ? Give two examples each of metals, non-metals and metalloids.
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 ?
Which of the following is a sol ?
Shaving cream, Milk, Fog, Soap solution, Hairspray
Fill in the following blank :
A colloid is a ..............mixture and its components can be separated by the technique known as ...............
Which of the following represents the solubility of sugar in water at 20°C ?
What is the difference between colloids and suspensions ?
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 ?
A carpenter wants to separate iron nails from saw-dust. Which method of separation should he choose ?
Which technique is used in a washing machine to squeeze out water from wet clothes while drying ?
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
How can you obtain pure water from a salt-water mixture (or salt-solution) ? Draw a neat and labelled diagram of the apparatus you would use to obtain pure water from a salt-water mixture (or salt-solution).
Which of the following are homogeneous in nature?
(i) ice
(ii) wood
(iii) soil
(iv) air
______ is so hard that it can scratch glass.
Atoms are tiny particles that repel each other when they are squeezed very close.
Define the term matter.
