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Cubic close packed arrangement of ions is described as
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The ionic radii of and ions are 1.47 and 1.95 , respectively. The most probable type of geometry exhibited by RbBr on the radius ratio rule is
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A vessel containing 10 litre of air at atmospheric pressure is connected to an evacuated 9 litre vessel The resulting pressure will be
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Correct gas equation is
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The electrical conductivity of metals is of the order of
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The vol. of 20 gm. of hydrogen at N.T.P. is
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All gases tend to show ideal behaviour
A. at low temperature and low pressure
B. at high temperature and high pressure
C. at high temperature and low pressure
D. at low temperature and high pressure
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4
The number of atoms in 0.004 gm of magnesium is close to
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Volume occupied by 1 gm equivalent of oxygen at NTP is
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Which of the following is an example of covalent network solid?
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The number of tetrahedral and octahedral voids per atom in a crystal lattice are, respectively
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20 litres of hydrogen gas weighs about
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What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?
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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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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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Indicate the most viscous liquid of the following
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Which of the following statement wrong?
A. In solid state molecules, atoms or ions are held with a strong force of attraction and are in a fixed position
B. In liquid state the molecules, atom or ions are held with a strong force and have a restricted motion
C. In gaseous states, the molecules are randomly arranged and are apart from each other
D. Solid, liquid and gaseous states have different movement is particles
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The number of molecules is 4.25 g of ammonia are approximately
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The mean free path of a gas molecule is the distance
A. between the two opposite walls of the container
B. through which the molecules travel in one second
C. through which molecules move between two consecutive collisions
D. travelled by all the molecules divided by the total number of molecules in a particular gas
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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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An element has atomic weight 24 and equivalent weight 11.9. Its valency 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 radii of and are 95 pm and 181 pm respectively. Coordination number of is expected to be
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Four 1 litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone 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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In the ideal gas equation PV = nRT constant 'R' has the unit
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The vapour density of completely dissociated sociated would be
A. Determined by the amount of solid used in the experiment
B. Triple to that of
D. Slightly less than half of that of
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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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To which of the following mixtures is the Dalton's law of partial pressures not applicable?
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The vol. of 20 gms of nitrogen at N.T.P.
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In anti-fluorite structure the negative ions
A. occupy tetrahedral voids
B. occupy octahedral voids