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8/18/2019 Question Paper of Law of Conservation of Mass - Class 9
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Test I
Subject- Chemistry (ICSE)
Class - IX
Marks 20
All questios are com!ulsory"
1. Choose the correct answer from the given options: 3*2=6
a.
According to the law of conservation of mass, how much zinc was present in the
zinc carbonate?
A 40 g
B 88 g
C 104 g
D 25 g
b. !hich chemical e"uation supports the law of conservation of mass?
F 2#2$%l& →#2 %g& + $2 %g&
G 'n%s& + #(l%aq& → 'n(l2 %aq& + #2 %g&
H Al4()%s& + #2$%l& → (#4%g& + Al%$#& )%s&
J (#4 %g& + 2$2 %g& →($2 %g& + 2#2$%g&
c. *he illustrations below show a conservation+of+mass eperiment- *he solution
in the bea.er lost mass because
F materials have less mass at high temperatures
G the mass of the reactants and products was less than 100 g
H sodium sulfate %/a2$4& is lighter than air
J some of the water molecules turned into gas
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8/18/2019 Question Paper of Law of Conservation of Mass - Class 9
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2- !hich of the following are matter? iscuss brie3-
%)&(hair, air, love, small, hate, almonds,thought, cold,cold drin., smell of
perfume)- !hat are the characteristics of particles of matter?
%)&4- *he mass per unit volume of a substance is called densit3
%ensit3massvolume&- Arrange the following in order of increasing densit3 6
air, ehaust from chimne3, hone3, water, chal., cotton and iron-
%2&5- a- *abulate the di7erences in the characteristics of states of matter-
%4&b- (omment upon the following rigidit3, compressibilit3, uidit3, 9lling a gas
container, shape, .inetic energ3-
%2&
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8/18/2019 Question Paper of Law of Conservation of Mass - Class 9
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