Chapter 7
Solution
and suspension
Short
Questions:
Q1. What is solution?
Give an example?
A solution is a uniform
mixture of two or more substances.
e.g., salt mix in
water.
Q2. What is difference
between solute and solvent?
Solute:
It
is a substance that dissolves.
e.g.,
salt
Solvent:
It
sis a substance that dissolves or dissolves a solute. E.g., water
Q3.
What is difference between dilute and concentrated solution?
Dilute
solution:
It
is a weak solution or one having little solute.
Concentrated
solution:
It
is a strong solution or one containing large solute.
Q4:
State four characteristics of a solution?
1. Particles
of solute do not sattle at out.
2. Particles
pass through filter paper.
3. Light
rays do not scatter on passing through solution.
4. Mixture
of solute and solvent should be uniform.
Q5. What is saturated
solution? What effect does warming have on saturated solution?
Saturated solution is
one that will not dissolve any more solute at that temperature.
When we warm the
solution, it converted into super saturated solution.
Q6. What is
supersaturated solution?
It is a solution that
have more solute in solution than would normally dissolve at that temperature.
Q7. How would you make
a concentrated solution weaker?
By increasing the
amount of solvent or by decreasing the amount of solvent in solution, we can
make a concentrated solution weaker.
Q8. What is meant by
solubility of substance? What effect does temperature have on solubility of a
substance?
The solubility of a
solid in a liquid in an amount of solid which will dissolve in 100mg of that
liquid at given temperature. Solubility increased with increasing temperature.
Q9: What is suspension?
Give three examples?
A suspension is a
mixture containing tiny solid as liquid particles suspended in a liquid as gas.
e.g.,
i. solid and water.
ii. Indigestion mixture
iii. Window cleaner
Q10. What is effect of
temperature on the amount of gas that will dissolve in a liquid?
More gas dissolve in
liquid at low temperature than in warm.
Q11. What is difference
between miscible and immiscible solutions?
Miscible
solution:
When liquid dissolve in
water called miscible solution. e.g., ink and water.
Immiscible
solution:
When liquid does not
dissolve in water called immiscible solution. e.g., soil and water.
Q12. What is difference
between homogeneous and non homogeneous solutions?
Homogeneous:
It is a solution where
the components that make up a solution are uniformly distributed throughout the
solution.
Non homogeneous:
|The solution in which
components of solution does not uniformly distributed called non homogeneous
solution.
Long
Questions:
Q1. Prove that why
water is considered as a universal solvent?
Most of things dissolve
in water easily we can say that water is a very good solvent.
i.
Sugar, rock salt
etc dissolve in water.
ii.
Mild, alcohol,
lemon juice and vinegar dissolve in water.
iii.
The food we eat
form a solution in the body and then absorbs in the blood.
iv.
Many harmful
substances produce in our body. These substances dissolve in water and excrete
as urine.
v.
Plants absorb
minerals from the soil that are dissolve in water.
vi.
Oxygen gas dissolve
in water. It keeps aquatic animals alive.
vii.
CO2 gas also
dissolve in water and keep equatic plants alive.
Q2. Write a note on
solution and suspension?
Solution:
A solution is a
homogeneous mixture of two or more component. It have following properties.
Particles pass through
filter paper.
Light rays can pass
through solution.
Examples:
Air, alloy, lemonade,
tea and carbonate water.
Suspension:
A mixture in which the
solute particles are too large to move freely with the solvent particles and
particles settle down after some time, is called a suspension. It have
following properties.
i.
Particles can be
separated by filter paper.
ii.
Light rays
scatter on passing through suspension.
Examples:
