Question

1. Mention three properties of materials.
2. Name two materials which are soluble in
water.
3. Name two substances which have lustre.
4. How will you determine hardness of a
given substance ?
5. Define miscible and immiscible liquids.
6. Solubility of oxygen in water is very
useful for aquatic animals. Why?
7. Name the gas dissolved in soft cold
drinks.​

Answer 1

Answer:

1 .three property of material are :-

•They are hard.

•They are sonorous and produce ringing sound when strike with hard object.

•They are ductile and can be beaten into thin sheets.

2.two material which are soluble in water are:-

•sugar and salt are two material that can

dissolved in water.

3.two substance which have luster are:-

•gold and silver are two material which shows lustre.

4.we can determine the hardness

of given substance by:-

•we can determine by interpaetical force of attraction between the materials.

5. miscible- the liquids which have

mixed layer.eg- sugar dissolves in water.

imiscible- the liquid which have separate layers.eg-oil dissolve in water.

6.dissolve oxygen is one of the most important indicator to determine water quality.it is responsible for survive of fishes and other aquatic plants.

7.carbon dioxide is answer.

hope it helps uh

@sumedhian