Related Questions
What is the correct answer?
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
What is the correct answer?
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
What is the correct answer?
4
6.If the reactants and products both are in gaseous phase they bear a simple ratio in their
What is the correct answer?
4
The vol. of 20 gms of nitrogen at N.T.P.
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 space occupied by spheres in ccp arrangement is
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 radii of and are 95 pm and 181 pm respectively. Coordination number of is expected to be
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
The weight of 22.4 litres of any gas at N.T.P. represent its
What is the correct answer?
4
The average kinetic energy of the molecule of (moL wt. = 64) at 27°C is E. Then the average kinetic energy of at 27°C 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
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
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
When there is more deviation in the behaviour of a gas from ideal gas equation PV = nRT
A. at high temperature and low pressure
B. at low temperature and high pressure
C. at high temperature and high pressure
D. at low temperature and low pressure
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
Which of the following methods is used to determine the atomic weight?
What is the correct answer?
4
The ionic radii of and are 0.66 and 1.40 , respectively. The most probable type of gteometry exhibited by MgO on the basis of radius ratio rule is
What is the correct answer?
4
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
What is the correct answer?
4
In a unit cell of cesium chloride the arrangement of cesium ions is
B. hexagonal close packed
What is the correct answer?
4
Which of the following is an example of covalent network solid?
What is the correct answer?
4
Three dimensional array of points in space is called
What is the correct answer?
4
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
What is the correct answer?
4
The number of atoms per unit cell in simple cubic, face centred cubic and body centred cubic arrangement are, respectively
What is the correct answer?
4
Correct gas equation is
What is the correct answer?
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
What is the correct answer?
4
What will be the mass of 6.03 x molecules of carbon monoxide ?
What is the correct answer?
4
Certain volume of a gas exerts on its walls some pressure at a particular temperature. It has been found that by reducing the volume of the gas to half its original value, the pressure becomes I twice that the initial value of constant temperature. This happens because
A. More number of a gas molecules strike the surface per second
B. Velocity of the gas molecules increases
C. Gas molecules attract each other
D. Weight of the gas increase with volume
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
The number of molecules in 4.25 gm of ammonia are approximately