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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