Chapter 2, Problem 7STP

Interpretation Introduction

Interpretation: The figure that represents a solid element needs to be identified.

Concept Introduction: Practically all of the matter in environment consists of mixtures of different substance. For example, soil; it has many forms of components, air; it has mixture of many gases, etc.

Answer to Problem 7STP

Correct answer: Option B

Explanation of Solution

Reason for correct option:

Matter that is composed of tightly packed particles, called Solid. Solids are rigid in comparison to liquids and gases and also, the have a definite shape & volume. Molecules which make up a solid are set in repeating, regularpattern and also, they are held definitely in place (can vibrate within a limited range). According to this, figure B represents a solid element.

Conclusion

Reasons for incorrect options:

Option A: Figure A does not satisfy the condition of solid element. So, this is an incorrect option.

Option C: Figure C does not satisfy the condition of solid element. So, this is an incorrect option.

Option D: Figure D does not satisfy the condition of solid element. So, this is an incorrect option.

Option E: Figure E does not satisfy the condition of solid element. So, this is an incorrect option.