Ch-3
Nature of Matter
Assignment Q/A
Q1. Write the
difference solid,liquid and gas. Draw the diagram also?
A1. SOLIDS
(1)
Solids have fixed shape and volume.
(2)
Particles are very tightly packed.
(3)
Particles cannot move.
(4)
Force of attraction is maximum.
For
E.g:-> (1) Ball
(2) Metal
LIQUIDS
(1)
Liquids have a fixed volume but do not have a
fixed shape.
(2)
Particles are less tightly packed.
(3)
Particles can move little.
(4)
Force of attraction is less.
For
E.g:-> (1) Water
(2)
Ink
GASES
(1)
Gases do not have a fixed shape nor a fixed
volume.
(2)
Particles are very loosely.
(3)
Particles can move freely.
(4)
Force of attraction is zero.
For
Eg:-> (1) Oxygen
(2)
Carbon-Dioxide
Q2. Name the gas,which do not dissolved in water?
A2.
(1) Ozone
(2)
Helium
(3)
Hydrogen
Q3.
How can you increase the solubilty of material?
A3.
By increasing the temperature of material.
Q4.
Why is a water called a universal solvent?
A4.
Because a large number of substances can be dissolved in water.
Q5.
Name two gases which are soluble in water?
A5.
(1) Oxygen
(2)
Carbon-Dioxide
Q6.
Define classification.How it is useful?
A6.
The process of grouping objects with similar properties is called
classification.It makes the study of things easier and saves time.
Q7.
Define matter and synthetic material?
A7.
(1) Anything that occupies space and has more is called matter.
(2)
The material which are prepared in the factories are called man-made or
synthetic materials.
Q8.
How is soda water prepared?
A8.
Soda water is prepared by dissolving carbon-dioxide gas in water.
Q9.
Name the following:-
(a) Two materials that can sink in water?
A9.(a)
(1) Sand
(2)
Stone
(b) Two materials that can float on water?
(b) (1) Paper
(2)
Petales
(c) Two liquids soluble in water?
(c) (1) Milk
(2)
Lemon Juice
(d) Two liquids insoluble in water?
(d) (1) Oil
(2)
Petrol
