Subject Experts Solutions for Exercise 1: PRACTICE QUESTIONS (CLASSROOM WING)

Water plays an important role in the functioning of our body. Give reason.

How are animals and plants able to survive in water? 

When you come out of an AC car, a foggy appearance is noticed on the spectacles. Give reason. 

Name the gaseous non-metallic elements and the solid non-metallic elements. 

Explain a distinguished characteristic of an atom and a molecule. Based on it, match the following. 

(A)	(i) Elemental molecule
(B)	(ii) Elemental atom
(C)	(iii) Mixture of atoms
(D)	(iv) Mixture of molecules
(E)	(v) Compound of two elements
(F)	(vi) Compound of three elements

Define the following: 

Element. 

Define the following: 

Homogenous mixture.

Define the following: 

Metalloids.