Question

Q.1 why is it that
1)Air is a homogeneous mixture of various gases?
2) Water is a universal solvent?
3) There is no alternative to water for cleaning purpose?

Q.2 With Whom should I pair up
Group A
1)Air
2) Water
3) Soil


Group B
1)Excretion
2) Scattering of light
3) Plasticity

STD-7
Lesson-3 properties of natural Resources​

Answer 1

Answer:

Group A

i) Air

ii) Water

iii) Soil

Answer 2

Answer:

Air is a homogeneous mixture of gases as it is primarily made up of nitrogen and oxygen. Its elements are not readily separated or distinguished from one another. b. Water is a very good solvent as it can dissolve almost every substance in it, therefore water is known as the “universal solvent