Advertisements
Advertisements
Question
What difference in the properties of common salt and sand would enable you to separate a mixture of these two substances ?
Advertisements
Solution
The differences in the properties of common salt and sand that enable us to separate a mixture of these two substances are:
- Difference in the solubility of sand and salt. Salt is soluble in water, whereas sand is not. Therefore, we can separate sand from salt by taking water as solvent in the process of filtration.
- Salt is a solid that cannot vaporise. Thus, it can be obtained by the process of evaporation. In this process, all the water will evaporate leaving behind common salt.
APPEARS IN
RELATED QUESTIONS
The smallest unit of matter that exists freely in nature is called ...........
Select the correct alternative
The molecules can move freely anywhere in
- gases
- liquids
- solids
- none of the above
Liquids have definite shape and definite volume.
Define the following term of Matter .
What is the other name for impure substances ? Give two examples of impure substances.
The element which is not common between the compounds called baking soda and soda ash is
“Is malleable and ductile” best describes :
Which one of the following is not a metalloid ?
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 meant by the concentration of a solution ?
Name the process which can be used to recover salt from an aqueous salt solution.
What difference in the properties of oil and water enable their separation by a separating funnel ?
Fill in the following blanks with suitable words :
The gases of air can be separated by fractional distillation of liquid air because they have different..............
How would you separate iodine from a mixture of iodine and common salt ?
How will you separate camphor, common salt and iron nails from their mixture ?
Which of the following mixture cannot be separated by using water as the solvent ?
The dyes present in fountain pen ink can be separated by the technique of :
Liquids cannot be compressed and they have fixed volume.
Complete the following table:
| S.No. | CELSIUS | KELVIN |
| 1. | 90°C | 363 K |
| 2. | ______ | 283 K |
| 3. | 63 °C | ______ |
| 4. | 250°C | ______ |
| 5. | ______ | 303 K |
