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Molecular formula of D in the above case is
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Arrange the following in order of increasing inter-molecular forces and boiling points:,He,
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Indicate the most viscous liquid of the following
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The V.D. of a gas is 11.2 gm. The volume occupied by 11.2 gm. of this gas at N.T.P. is
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4
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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The number of atoms in 0.004 gm of magnesium is close to
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The number of molecules in 32 gms of oxygen in
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1.The correct relationship representing the volume occupied by 44 gm of and 64 gm of at constant temperahire and pressure:
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An example of covalent solid is
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The coordination number of each sphere in hcp arrangement 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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22.4 litre of any gas at N.T.P. will contain
B. One gram atomic weight
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Lattice energy of a solid is high if
A. the radii of the ions are large
B. radii of the ions are small
C. charge on the ions are small
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The number of atoms per unit cell in bcc arrangement is
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Four 1 litre flasks are separately filled with hydrogen, helium, oxygen and ozone gases at the same temperature and pressure. The ratio of total number of atoms of these gases present in the different flasks would be
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Which of the following is an example of covalent network solid?
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Boltzmann constant is given by
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What will be the mass of 6.03 x molecules of carbon monoxide ?
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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 a dose packed arrangement of N spheres, the number of tetrahedral holes are
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Volume occupied by 4.4 gift of carbon dioxide is
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The best electrical conductor of the following is
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6.If the reactants and products both are in gaseous phase they bear a simple ratio in their
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The vapour density of ozone would be
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A liquid of density 1.742 g is observed to show a capillary rise of 73 mm in a tube of radius 0.65 mm. Then the surface tension of the liquid is
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At a given temperature and pressure 2 volumes of A combine with 5 volumes of B to form 2 volumes of C, and 1 volume of A combines with one volume of B to form 2 volumes of D. Then the formula of C is
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The vapour density of gas A is four times that of gas B. If the molecular weight of gas B is M, then the molecular weight of gas A is
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The number of molecules of present in 44 gms. of is
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In zinc blende structure, the zinc atoms occupy
C. half of the octahedral sites
D. half of the tetrahedral sites
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The vol. of 20 gm. of hydrogen at N.T.P. is