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
A kind of matter which can sublime is
What is the scientific name of particles which make up mater?
Explain why steel is used to make railway lines.
Define matter. Give four examples of matter.
What are the characteristics of matter?
Bromine and air take about 15 minutes to diffuse completely but bromine diffuses into a vacuum very rapidly. Why is this so?
Which type of elements, metals or non-metals, show the property of brittleness ?
Iron powder and sulphur powder were mixed together and divided into two parts A and B. When part A was heated strongly over a burner, then a substance C was formed. The part B was, however, not heated at all. When dilute hydrochloric acid was added to substance C, then gas D was evolved and when dilute hydrochloric acid was added to part B then gas E was evolved.
- What type of substance is B ?
- What type of substance is C ?
- Name the gas (i) D, and (ii) E ?
- State one characteristic property of gas D.
- Write one test to identify gas E.
Out of a colloid, solution and a suspension :
which one has the largest particles ?
Name the different types of solutions. Give one example of each.
What will happen if a saturated solution is :
- heated
- cooled
Which of the following are chemical changes and which physical ? Give reason.
- a glass bottle breaking
- coal burning in air
- making a cake
- wool being knitted into a sweater
One of the following is a solid foam. This one is :
One of the following liquids will leave behind a residue on heating. This one is :
Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?
Describe a method for separating a mixture of iron filings and sulphur powder other than that by using a magnet.
Justify your answer.
| Figure 1 | Figure 2 | Figure 3 |
 |
 |
 |
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?
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
The phenomenon of Evaporation takes place at the ______ of a liquid.
Define the term matter.
