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Which of the following methods is used to determine the atomic weight?
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The molecular weight of a volatile liquid can be determined by
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The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure:
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A balloon filled with ethane is pricked up with sharp point and quickly plunged into a tank of hydrogen at the same pressure. After some time balloon will
C. remain unchanged in size
D. have half its volume of the gas
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In which one of the following does diffusion occur most rapidly?
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In the gas equation PV = xT, x is a constant. The value of the constant depends upon
C. type values of T and P
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What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?
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The number of molecules of present in 44 gms. of is
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At what temperature, the root mean square velocity of oxygen molecules is equal to that of at 27°C?
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The number of N2 molecules present in 28 nitrogen is
C. 6 x approximately
D. 5 x approximately
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Cubic close packed arrangement of ions is described as
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The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends upon the
B. temperature of the gas
D. pressure, temperature and volume of the gas
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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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22.4 litres of at 27.3°C and 1 atmosphere pressure shall weigh
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In what ratio by mass carbon monoxide and nitrogen should be mixed so that partial pressure exerted by each gas is same?
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Kinetic theory of gases postulates :
A. The molecules in a gas are in stationary state
B. The molecules in a gas exert appreciable attraction on each other
C. The molecules move in a random motion with widely different velocities
D. The molecules in a gas collide against each other as well as the wall of the container, but do not change their direction of motion
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The vapour density of pure ozone would be
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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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According to Avogadro's hypothesis equal volumes of two gases under the same conditions of temperature and pressure contain
A. Equal number of electrons
D. Equal number of molecules
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What will be the mass of 6.03 x molecules of carbon monoxide ?
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Molecular formula of D in the above case is
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The Van der Waal's equation explains the behaviour of
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The number of tetrahedral and octahedral voids per atom in a crystal lattice are, respectively
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In fluorite structure coordination number of calcium ions is
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A gas or vapour may be liquefied only at a temperature at or
A. below the critical temperature
B. above the critical temperature
C. above the normal boiling point
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22.4 litre of any gas at N.T.P. will contain
B. One gram atomic weight
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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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Which one of the following contains same number of molecules as 4.4 gm of carbon dioxide (mol. wt. of = 44, Mol, wt. of = 64)?
A. 64 gm of sulphur dioxide
B. 4.4 gm of sulphur dioxide
C. 6.4 gm of sulphur dioxide
D. 3.2 gm of sulphur dioxide
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Volume occupied by 1 gm equivalent of oxygen at NTP is
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The radii of and are 95 pm and 181 pm respectively. Coordination number of is expected to be