Related Questions
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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
What types of forces are present in molecular solids?
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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
The radii of and are 95 pm and 181 pm respectively. Coordination number of is expected to be
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4
The ratio of RMS velocity to average velocity of a gas molecule at a particular temperature is
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4
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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4
A chalk box exhibits
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The number of tetrahedral and octahedral voids per atom in a crystal lattice are, respectively
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The vapour density of ozone would be
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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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4
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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4
In NaCl type structure, the coordination number of the cation and anion are
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4
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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4
The Van der Waal's equation explains the behaviour of
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4
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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4
To which of the following mixtures is the Dalton's law of partial pressures not applicable?
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4
The limiting radii ratio for the tetrahedral geometry is
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4
In a face centred cubic arrangement of ions, the coordination number of ions is
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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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4
Chloroform and benzene form a pair of miscible liquids. These can be separated by
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When an ideal gas undergoes unrestricted expansion, no cooling occurs because the molecules
A. are above inversion temperature
B. exert no attractive force on each other
C. do work equal to loss in kinetic energy
D. collide without loss of energy
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4
The number of atoms per unit cell in simple cubic, face centred cubic and body centred cubic arrangement are, respectively
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Vapour density of a gas is 35.5. The volume occupied by 3.55 gm of the gas at NTPis
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An element has atomic weight 24 and equivalent weight 11.9. Its valency is
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4
What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?
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4
The critical temperature of a substance is defined as
A. the temperature above which the substance decomposes
B. the temperature above which the substance can exist only as a gas
C. melting point of the substance
D. boiling point of the substanc
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4
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
If the temperature and pressure remain unchanged the volume of obtained by the decomposition of a certain volume of will be
A. Triple the volume of
B. Half the volume of
C. Equal to the volume of
D. One third the volume of
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4
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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Boltzmann constant is given by