Related Questions
What is the correct answer?
4
In which one of the following does diffusion occur most rapidly?
What is the correct answer?
4
The temperature at which a real gas obeys the ideal gas laws over a wide range of pressure:
What is the correct answer?
4
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
What is the correct answer?
4
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
What is the correct answer?
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
What is the correct answer?
4
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
What is the correct answer?
4
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
What is the correct answer?
4
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
What is the correct answer?
4
Chloroform and benzene form a pair of miscible liquids. These can be separated by
What is the correct answer?
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 ?
What is the correct answer?
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
What is the correct answer?
4
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
What is the correct answer?
4
The number of atoms in 0.004 gm of magnesium is close to
What is the correct answer?
4
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
What is the correct answer?
4
A vessel containing 10 litre of air at atmospheric pressure is connected to an evacuated 9 litre vessel The resulting pressure will be
What is the correct answer?
4
In a close packed arrangement of N spheres, the number of octahedral holes are
What is the correct answer?
4
The best electrical conductor of the following is
What is the correct answer?
4
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?
What is the correct answer?
4
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
What is the correct answer?
4
In the ideal gas equation PV = nRT constant 'R' has the unit
What is the correct answer?
4
In NaCl type structure, the coordination number of the cation and anion are
What is the correct answer?
4
Indicate the most volatile liquid of the following:
What is the correct answer?
4
Indicate the most viscous liquid of the following
What is the correct answer?
4
What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?
What is the correct answer?
4
Which of the following contains the same number of atoms as 12 gms: of Magnesium (Atomic weights : Mg = 24, C = 12, Ca = 40)
What is the correct answer?
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
What is the correct answer?
4
Absolute zero is the temperature at which
B. all gases become liquid
C. all substances are solid
D. molecular motion ceases
What is the correct answer?
4
In zinc blende structure, the zinc atoms occupy
C. half of the octahedral sites
D. half of the tetrahedral sites
What is the correct answer?
4
Number of molecules of carbon dioxide present in 44 gm is
A. 12 x approximately
B. 3 x approximately
C. 6 x approximately
D. 3 x approximately
What is the correct answer?
4
How many moles of water are present in 180 gm. of water ?