Related Questions
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The vol. of 20 gm. of hydrogen at N.T.P. is
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Density of a gas relative to air is 2.3. If the average molar mass of air is 29.08/mol, the molecular mass of the gas will be
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4
If all the octahedral sites in a cubic close packed arrangement () are completelyfilled with cations, the empirical formula of the compound could then be
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4
22.4 litres of at 27.3°C and 1 atmosphere pressure shall weigh
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4
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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4
A chalk box exhibits
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The limiting radii ratio for the tetrahedral geometry is
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Gases deviate from the ideal behaviour because their molecules
A. possess negligible volume
B. have forces of attraction between them
D. are not attracted to one another
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Avogadro stated that under similar conditions of temperature and pressure equal volumes of all gases contain equal number of
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What will be the mass of 6.023 x molecules of carbon monoxide?
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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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From the Dulong and Petit's law atomic weight is given by which one of the following relations?
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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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Of the following properties, the magnitude of one must always increase with temperature. The property is
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The molecular velocity of any gas is
A. proportional to absolute temperature
B. proportional to the square root of absolute temperature
C. independent of temperature
D. proportional to die square of absolute temperature
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The vapour density of a gas in 35.5. The volume occupies by 3.55 gms of the gas at N.T.P. is
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Which compound possesses greatest lattice energy?
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Match box has the symmetry of which of the following systems?
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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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4
In zinc blende structure, the zinc atoms occupy
C. half of the octahedral sites
D. half of the tetrahedral sites
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4
The number of N2 molecules present in 28 nitrogen is
C. 6 x approximately
D. 5 x approximately
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An open vessel at 37°C is heated until 3/5 of the air in it has been expelled. Assuming that the volume of the vessel remains constant the temperature to which the vessel is heated is
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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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4
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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4
The electrical conductivity of metals is of the order of
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Which of the following contains the same number of atoms as 12 gms: of Magnesium (Atomic weights : Mg = 24, C = 12, Ca = 40)
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Kinetic gas equation is, PV =...
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How many nearest neighbours are there in an atom or ion in an octahedral hole of a close packed structure?
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For a given gas at temperature T and pressure P the root mean square velocity (RMS) is C; then at temperature T and pressure 3P the RMS 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