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Page # 134
STOICHIOMETRY - 1
Sol.
Sol.
40.
37.
An evacuated glass vessel weighs 50 gm when
empty, 148.0 g when completely filled with liquid
of density 0.98 gml–1 and 50.5 g when filled with
an ideal gas at 760 mm at 300 K. Determine the
molecular weight of the gas. [JEE ‘98,3]
Statement-1 : 1 g-atom of sulphur contains
Avogadro number of sulphur molecules
Statement-2 : Atomicity of sulphur is eight.
Sol.
Sol.
41.
38.
At 100° C and 1 atmp, if the density of liquid
water is 1.0 g cm –3 and that of water vapour is
0.0006 g cm–3 , then the volume occupied by
water molecules 1 L of steam at that temperature
is :
[JEE ‘2001 (Scr), 1]
(A) 6 cm3
(B) 60 cm 3
(C) 0.6 cm3
(D) 0.06 cm3
Statement-1 : The number of O atoms in
1 gm. of O 2, 1 gm O 3 and 1 gm of atomic
oxygen is same.
S ta te m en t- 2 : E ach o f th e spe ci e s
represents 1/16 gm-atom of oxygen.
Sol.
Sol.
42.
Each of the questions given below consists of
Statement-I and Statement-II. Use the following
Key to choose the appropriate answer.
(A) If both statement-1 and statement-2 are
correct, and statement-2 is the correct explanation of statement-1
Statement-1 : The rati o by volume of H 2 :
Cl 2 : HCl in a reaction H 2(g) + Cl 2(g)
2HCl(g)
is 1 : 1 : 2.
Statement-2 : Substances always react in
such a way that their volume ratio i s in
si mple integers.
Sol.
(B) If both statement-1 and statement-2 are correct, and statement-2 is not the correct explanation of
statement-1
(C) If statement-1 is correct and statement-2 is
incorrect
43.
(D) If statement-1 is incorrect and statement-2
is correct
Statement-1 : 0.2 N H 2 SO 4 solution has
molarity equal to 0.2 M.
Statement-2 : H2SO 4 is a diabasic acid.
Sol.
39
Statement-1 : Molarity of pure water is
55.5 M.
Sta tement-2 : M ol ari ty is temperature
dependent parameter
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