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7.Which of the following sets of conditions represent the easiest way to liquefy a gas?
A. Low temperature and high pressure
B. High temperature and low pressure
C. High temperature and low pressure
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Indicate the most volatile liquid of the following:
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The number of atoms in 0.004 gm of magnesium is close to
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In the wurtzite structure sulphur atoms have
B. hexagonal dose packed arrangement
C. body centred arrangement
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Match box has the symmetry of which of the following systems?
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In NaCl type structure, the coordination number of the cation and anion are
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Which of the following phrases would be incorrect to use?
C. A molecule of a compound
D. A molecule of an element
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One mole of gas is defined as
A. The number of molecules in 22.4 litres of gas at S.T.P
B. The number of molecules contained | in 6 grams of 12 C isotope
C. The number of molecules in one formula weight of gas
D. The number of molecules in litre of gas
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Kinetic gas equation is, PV =...
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Normal boiling points values are for , - 34C, bromine 58°C, carbon tetrachloride 77°C and oxygen - 183°C. Which of these liquids has the highest vapour pressure at room temperature?
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The weight of 22.4 litres of any gas at N.T.P. represent its
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Which of the following would you expect to affect the vapour pressure of a liquid?
A. Inter-molecular forces in the liquid
B. Volume of the liquid in the liquid-vapour equilibrium
C. Volume of the vapour in the liquid-vapour equilibrium
D. The size of the container in which liquid-vapour equilibrium is establishe
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In a close packed arrangement of N spheres, the number of octahedral holes are
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5.At a given temperature and pressure 2 volumes of A combine with 5 volumes of B to form 2 volmes of C and 1 volume. A combine with one volume of B to form 2 volumes of D. The formula of C is
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Of the following properties, the magnitude of one must always increase with temperature. The property is
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The Van der Waal's equation explains the behaviour of
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The weight of 11.2 litres of at S.T.P. would be
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A closed vessel contains equal number of molecules of a total pressure at 740 mm. If oxygen is removed from the system the pressure will
D. become double of 740 mm
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In the ideal gas equation PV = nRT constant 'R' has the unit
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Which of the following is an example of covalent network solid?
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The wt. of 2.8 litres of a gas at N.T.P. is 3.50 gms. Its V.D. is
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In a dose packed arrangement of N spheres, the number of tetrahedral holes are
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Correct gas equation is
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Boltzmann constant is given by
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The vol. of 20 gm. of hydrogen at N.T.P. is
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Volume occupied by 1 gm equivalent of oxygen at NTP is
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The ionic radii of and are 0.66 and 1.40 , respectively. The most probable type of gteometry exhibited by MgO on the basis of radius ratio rule is
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At 303 K ethanol has a vapour pressure of about 0.118 atm., acetic acid has the vapour pressure of about 0.039 atm., and ethyl iodide has a vapour pressure of about 0.263 atm. Which of the following represents the correct order of increasing normal boiling point ?
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Absolute zero is the temperature at which
B. all gases become liquid
C. all substances are solid
D. molecular motion ceases
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The vol. of 20 gms of nitrogen at N.T.P.