Quality Education At
Every level
Chapter
#02
Three States of Matter
Prepared
by:
Lecturer.
S.Fayyaz Hussain
City Of
Knowledge
(Science Campus)
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Chapter
# 2
(State Of Matter)
1994
Q.1 (a)Define the following.
·
Graham’s Law of
Diffusion
·
Dalton’s Law of
Partial Pressure
·
Avodadro’s Law
(b)
A mixture of
Helium and Hydrogen is confined in a 12dm3 flask at 30oC
if 0.2 mole of the Helium is present. Find out the partial pressure of each gas
where the pressure of mixture of gases is 2atm.
(c)
Define the solid
state. What are its three types, also state its behavior in detail.
1995
Q.2 (a) What is the basic
postulates of the kinetic molecular theory? Why
real gas deviate from ideal behavior?
(b) What
is the effect of pressure on three state of matter on the basis of kinetic
molecular theory.
(c)
Calculate the value of R (gas constant) in two different unit.
1996
Q.2 (a) State and explain Dalton’s Law of Partial
Pressure.
(b) The
volume of the Oxygen gas collected over water at 24oC and 762 torr
(mm of Hg) pressure is 128 ml volume. Calculate the mass Oxygen gas.
(d) Write
the six name of Crystalline systems.
1997
Q.4 (a) What are main postulate of Kinetic Theory? How
does it explain the following properties of gases?
ö Diffusibility ö Compresibility ö Expension
(b) 13.2g
of gass occupies a volume of 0.918dm3 at 25oC and 8atm
pressure. Calculate the molecular mass of the gas.
(c) What
is surface tension? Discuss any two factor which affect surface tension.
1998
Q.3 (a) Calculate
the value of R (gas constant) with help of Gas equation when pressure is in
atmosphere and the volume in the dm3 pressure is in NM-2
and volume is cubic meter.
(b) State and explain Graham’s law of diffusion of gas (OR)
Dalton’s law of partial pressure.
(c) Differentiate between isomorphism and
polymorphism.
(d) 400cm3 of Helium gas take to
effuses from a porous container in 20 second. How long will be SO2
gas take to effuses from same container?
(e) What will be the shape of the unit if.
a = b = c and a = b = ¶
1999
Q.4 (a) Define
viscosity.
(b) Discuss three behavior of liquid.
(c) Explain surface tension with examples.
Q.2 (a) A
quantity of gas measure 500ml at 35oC and 600mm (Hg).
What
would be the volume of the as at 45oC and 800mm (Hg)?
Q.7 (a) Give
reasons.
Ø
Evaporation is
cooling process.
Ø
A falling drop of
liquid is always spherical
Ø
Pressure cooker
is used for rapid cooking.
2000
Q.3 (b) 1.4dm3
volume of gas measure at temperature of 27oC. and pressure 900 torr
was found to a mass of gas 2.273g. Calculate the molecular mass of gas.
Q.8 (a) Differentiate
between isomorphism and polymorphism.
(b) Discuss the laws which deal with the effect
of change in temperatue and pressure on certain volume of gas.
(c) Give reasons.
ü
Glycerine is
distilled at reduced pressure.
ü
Process of
diffusion occur most rapidly in gases than in liquid and very slow in solid.
ü
A liquid rises in
capillary tube.
ü
Graphite is good
conductor of electricity where Diamond is not.
(d) Three container of equal volume are filled as
follows.
2
mole of H2 gas at 0oC
1
mole of N2 gas at 273 K
3
mole of O2 gas at 27oC
Which
container is at lowest pressure and which container has largest numver of
molecules.
2001
Q.2 (a) What
are the postulate of the kinetic molecular.
Theory
of Gases?
(b)
Explain any two
of the following:
(c)
Correct the
following statement giving the name of the respective laws of principle:
·
The volume of gas
at 27oC doubles at 54oC.
·
H2 gas
(molecular mass = 2) take more time to diffuse that O2 gas
(Molecular mass = 32).
·
The electronic
configuration of C (At. No. = 6) is 1s2, 2s3, 2p1
(CH#3)
·
Rate of a chemical
reaction is inversely proportional to the product of active masses of the
reactant at constant temperature.
2002 (Pre – Medical)
Q.3 (a ) State nad explain the Dalton’s law of
partial pressure.
(b) Calculate the molecular mass of a gas
whose rate of diffuse in twice of that of CH4.
(c)380 cm3 of hydrogen gas
was collected over water at 23oC and 613 torr: find the volume of
dry hydrogen at S.T.P. (vapour pressure of water at 23oC is 21
torr.)
(d)
What is the
volume of 2.5 mole of N2 gas
at S.T.P.?
2002 (Pre –
engineering)
Q.2 (a) State
the Dalton’s law of partial pressure. A mixture of .2 mole of gas “A” and 1.1
gm of anther gas “”B” (mol. Mass = 44) exerts a pressure of 750 torr: calculate
the partial pressure of the two gases.
(b) Give reasons for the
following:
Food
is cooked more quickly in pressure a cooker that in an ordinary pot the
kitchen.
2003 (Pre –
Engineering)
Q.2 (a) Differentiate
between crystalline solids and amorphous solids.
(b) Derive the equation of state
for an ideal gas and calculate the value of he gas constant in two different
units.
(c) A 500cm3 vessel
contains H2 gas at 400 torr and another 1.0dm# Vessel
contains O2 gas at 600 torr. If these gases are
transferred to 2dm3 empty vessel, calculate the total pressure of
the mixture of the gases.
(d) Select the answer for each
from the given options.
i) If a = b ¹ c and a = b = g = 90o, then
the shape of the unit cell will be:
¨ Trigonal
¨ Cubic ¨ Tetragonal
2003
(Pre – Medical)
Q.2 (a) Give
the main postulates of the Kinetic molecular theory. How does this theory
explain the Boyle’s Law and Charle’s Law?
(b) State and explain Grahams’
Law of Diffusion of gases.
(c) A given mass of a gas
occupies 76 cm3 at 16oC and 760 torr pressure; calculate
its volume at S.T.P.
(d) Differentiate between
crystalline solids and amorphous solids.
2004
Q.3 (a) State
and explain Dalton’s law of Partial Pressure.
(b) Explain the following Laws on
the basis of Kinetic Molecular theory.
i)
Graham’s Law ii)
Charle’s Law
(c) What is density of the
methane (CH4) gas at 127oC and 3.5 atmosphere.
(d) Give the reasons for the
following:-
i)
A falling drop of a liquid is always
spherical.
ii) Glycerine is distilled at a reduced
pressure.
iii)
NaF and MgO are
isomorphous compounds.
2005
2-(a) State
and explain Graham’s Law of Diffusion of gases.
(b) Give the postulates of the Kinetic Theory
of gases.
(c) Differentiate
between crystalline solid and amorphous solid.
(d) Write a short note on any One of the
following;
i) Surface
Tension. (ii) Vapour Pressure.
(e) What
will be the volume occupied by 14 gm of nitrogen at 200C and 740
torr pressure?
(f) Give
the reasons for the following:
(i)
The process of diffusion occurs most rapidly in gases, less rapidly in
liquid and very slowly in solid.
(ii) Evaporation
is a cooling process.
(iii) A
drop of ink spreads on a blotting paper.
2006
Q.2 (a) State
the following gas laws and explain in terms of Kinetic Molecular Theory:
(i) Boyle’s Law. (ii)
Charles’ Law. (iii) Dalton’s Law of
Partial Pressure.
(b) A 100 cm3 gas, cylinder
filled with chlorine under 160 torr pressure is connected
by stop-cock with
another cylinder of 400 cm3 filled with nitrogen under pressure
of 200 torr. What will
be the total pressure when stop cock is opened?
(c) Write true or false for the following:
(i) Hydrogen bond is a stronger bond than
the covalent bond.
(ii) CCI4 molecule has zero dipole
moment due to its symmetrical structure.
(d) Calculate the weight in
grams of 3.01 x 1020 molecules of glucose.
2007
Q.2 (a) Determine the value of gass constant R
in two different units.
(b)Correct
the underlined statements and name the gas laws concerned:
(i) H2 has the rate of diffusion
twice that of O2.
(ii) The mass of a gas expands twice if its
Temperature is raised from 270C to 540C at the same
pressure.
(c) Explain Evaporation in liquids
and Deformity in solids in term of the Kinetic
Molecular Theory.
(d)
Fill in the blank
(i) CaCO3 exists in trigonal and
orthorhombic forms. This property is called Polymorphism.
(ii) As the temperature of a liquid is
increased, its viscosity. (Increase
/ decrease.)
(iii) NH4Cl is a / an ___Basic_____
salt. (Acidic, Basic, Neutral)
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