Chemistry class ix notes 9th class board pattern model paper
Chap-6 Solutions Important questions, if you attempt these question you will get InshaAllah 100% marks.
Chap-6 Solutions
Objective Part
Choose
the right option.
10×1=10
|
|
|
A
|
B
|
C
|
D
|
|
1
|
Tyndall effect is due to:
|
Blockage of
beam of light
|
Non scattering
of beam of light
|
Scattering of
beam of light
|
Passing through
beam of light
|
|
2
|
Molarity is the number of moles
of solute dissolved in:
|
1 kg of
solution
|
100g of solvent
|
1 dm3
of solvent
|
1 dm3
of solution
|
|
3
|
Which one of the solution
contains more water?
|
2 M
|
1 M
|
0.5 M
|
0.25 M
|
|
4
|
The emulsions are the type of
solution:
|
Solid in solid
|
Liquid in
liquid
|
Gas in liquid
|
None of above
|
|
5
|
Starch, glue are examples of:
|
Colloidal
solution
|
Solution
|
Colloids
|
Crystalline
|
|
6
|
Fog is an example of solution:
|
Gas in liquid
|
Liquid in gas
|
Solid in liquid
|
Liquid in solid
|
|
7
|
The concentrate solution of NaCl
is called:
|
Fluid
|
Brass
|
Brine
|
Plasma
|
|
8
|
Concentration is most often
expressed as the ratio of amount of _______ to the amount of solution.
|
Solute
|
Solvent
|
Brine
|
Salt
|
|
9
|
Which one of the following is heterogenous
mixture?
|
Milk
|
Ink
|
Milk of
magnesia
|
Sugar solution
|
|
10
|
Tyndall effect is shown by:
|
Sugar solution
|
Paints
|
Jelly
|
Chalk solution
|
Subjective
Answer
the short questions
10×2=20
1.
Define
solvent and solute.
2.
Why
we stir paints thoroughly before using?
3.
What
do you mean by volume/volume %?
4.
Define
solubility.
5.
Why
test-tube becomes cold, when KNO3 is dissolved in water?
6.
What
is difference between colloid and suspension?
7.
What
is Tyndall effect and on what factors it depends?
8.
What
is supersaturated solution?
9.
What
are dilute and concentrated solutions?
10.
Define
molarity. Give its formula and unit.
Long
Questions 5×1=5
(a)
What is meant by concentration of a solution? Describe the different ways of
expressing the percentage composition of solution. 3
(b) When we dissolve 20g of NaCl in
400cm3 of a solution, what will be its molarity? 2
Available all
Metric chemistry ix notes chapter wise:
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