Answer these questions:
(a) What is a solid? Write its properties.
(b) Enlist the properties of a liquid
(d) What do you mean by a symbol? What are the bases of making
(E)What is a compound? Name any four compounds.
symbols?
Answers
Answer:
(a) Solid are characterized by structural rigidity and resistance to changes of shape or volume. Unlike a liquid, a solid object does not flow to take on the shape of its container, nor does expands to fill the entire volume available to it like a gas . Properties:
A solid has a definite shape and volume.
•Solids in general have higher density.
•In solids, intermolecular forces are strong.
•Diffusion of a solid into another solid is extremely slow.
•Solids have high melting point.
(b) Properties of Liquid:
Liquids are almost incompressible. In liquids molecules are pretty close to each other. ...
•Liquids have fixed volume but no fixed shape.
•Liquids flow from higher to lower level.
•Liquids have their boiling points above room temperature, under normal conditions.
(d) A symbol is a mark, sign or word that indicates, signifies, or is understood as representing an ... Symbols are the basis of all human understanding and serve as vehicles of conception for all human knowledge.
(e) something that consists of two or more things or substances combined together. Examples :
•Alcohol - C2H6O
•Acetic Acid - C2H4O2
•Sulphuric Acid - H2SO
•Ammonia - NH3