Class 9 –
Chemistry
IS MATTER
AROUND US PURE?
(Answer Any 10
Question)
Q.1
How to solution colloid and suspension
differ from each other?(5)
Q.2 Which separation technique will you apply for the separate son of following?(5)
a.
Sodium chloride from its solution in
water.
b.
Ammonium chloride from a mixture
containing sodium chloride and ammonium chloride
c.
Small piece of metal in the engine oil
of car
d.
Different pigment from an extract of
flower Petals
e.
Butter from curd also water
f.
Tea leaves from tea
g.
Iron pins from sand
h.
Wheat grains from husk
i.
Fine mud particles suspended in water
j.
Oil from water
Q.3 Which of the following material fall in
the category of a "pure substance" ?(5)
a.
Ice
b.
Milk
c.
Iron
d.
Hydrochloric Acid
e.
Calcium Oxide
f.
Mercury
g.
Brick
h.
Wood
i.
Water
Q.4 Classify the following into elements, compounds and mixtures.(5)
a.
Sodium
b.
Soil
c.
Sugar solution
d.
Silver
e.
Calcium carbonate
f.
Tin
g.
Silicon
h.
Coal
i.
Air
j.
Soap
k. Methane
l. Carbon dioxide
m. Blood
Q.5 What do you understand by the term distillation? Give its one application.(5)
Q.6 State the principle of separating two immiscible liquids by separating funnel. Describe
an activity with diagram to separate a mixture of water and kerosene
oil.(5)
Q.7 Distinguish between compounds and mixtures.(5)
Q.8 You are provided with a mixture containing sand, iron filings, Ammonium Chloride and
Q.7 Distinguish between compounds and mixtures.(5)
Q.8 You are provided with a mixture containing sand, iron filings, Ammonium Chloride and
Sodium chloride. Describe the procedure
you would use to separate these constituent
from the mixture.(5)
Numerical
Q.9 Calculate the mass of water and glucose required to make 250g of 40%
solution of glucose.(5)Q.10 2.5 g of sugar is dissolved in 47.5 g of water. Calculate its concentration as percent by mass. (5)
Q.11 5 g sugar is dissolved in 250 ml of solution. Calculate its mass percentage by volume.(5)
Q.12 How much water should be mixed with 12 ml of alcohol so as to obtain 12% alcohol solution?(5)
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