Question

B. Statements given below are incorrect. Write
correct statements :
1. A powerful magnet separates iron from the
compound iron sulphide.
2. Air is a compound of mainly oxygen and
nitrogen gas.
3. Sugar solution is an example of a hetero-
geneous mixture.
4. Milk is a pure substance.
5. In a mixture of iron and sulphur, the
particles of iron can be removed by
dissolving sulphur in water.​

Answer 1

Answer:

1.Iron sulphide is not attracted towards magnet whereas its element (iron) is attracted towards magnet. This suggests that properties of compound are different to the properties of its constituents. In words, magnetic iron on chemical combination with sulphur, gives non magnetic iron sulphide.

2.Air is a compound of mainly oxygen and  nitrogen gas.

3.Sugar solution is an example of a hetero- geneous mixture.

4. water is the pure substance

5. The given statement is false because we can separate the mixture by using a magnet which will attract the iron particles from the mixture