According to Avogadro's hypothesis equal volumes of two gases under the same conditions of temperature and pressure contain
Equal number of electrons
Equal number of ions
Equal number of atoms
Equal number of molecules
Correct Answer :
D. Equal number of molecules
Related Questions
From the Dulong and Petit's law atomic weight is given by which one of the following relations?
6.41 sp. heat
6.4/sp. heat
sp. heat/6.4
sp. heat/6.4 x 2
A vessel containing 10 litre of air at atmospheric pressure is connected to an evacuated 9 litre vessel The resulting pressure will be
2 atm
31 atm
0.526 atm
52.6 atm
How many nearest neighbours are there in an atom or ion in an octahedral hole of a close packed structure?
4
6
8
18
A closed vessel contains equal number of molecules of a total pressure at 740 mm. If oxygen is removed from the system the pressure will
become half of 740 mm
remain unchanged
become 1/9 of 740 mm
become double of 740 mm
Boltzmann constant is given by
R
R+N
R:N
R-N
Match box has the symmetry of which of the following systems?
Cubic
Orthorhombic
Tetragonal
Monoclinic
Molecular formula of D in the above case is
AB
Sodium chloride has fee structure. How many and ions are there in the unit cell?.
6 and 6
4 and 4
1 and 1
6 and 4
In what ratio by mass carbon monoxide and nitrogen should be mixed so that partial pressure exerted by each gas is same?
None of these
One mole of gas is defined as
The number of molecules in 22.4 litres of gas at S.T.P
The number of molecules contained | in 6 grams of 12 C isotope
The number of molecules in one formula weight of gas
The number of molecules in litre of gas
22.4 litre of any gas at N.T.P. will contain
One gram equivalent
One gram atomic weight
One gram atom
One gram molecule
What will be the mass of 6.023 x molecules of carbon monoxide?
14 gm
28 gm
16 gm
44 gm
The molecular velocity of any gas is
proportional to absolute temperature
proportional to the square root of absolute temperature
independent of temperature
proportional to die square of absolute temperature
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
1:1:1:1
1:2:2:3
2:1:2:3
3:2:2:1
The number of molecules is 4.25 g of ammonia are approximately
3.5 x
2.5 x
1.5 x
0.5 x
The mean free path of a gas molecule is the distance
between the two opposite walls of the container
through which the molecules travel in one second
through which molecules move between two consecutive collisions
travelled by all the molecules divided by the total number of molecules in a particular gas
The vapour density of a gas in 35.5. The volume occupies by 3.55 gms of the gas at N.T.P. is
224 litres
2.24 litres
11.12 litres
1.12 litres
All gases tend to show ideal behaviour
at low temperature and low pressure
at high temperature and high pressure
at high temperature and low pressure
at low temperature and high pressure
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
502°C
502 K
243.67°C
925C
The wt. of 2.8 litres of a gas at N.T.P. is 3.50 gms. Its V.D. is
20
28
32
14
If all the octahedral sites in a cubic close packed arrangement () are completelyfilled with cations, the empirical formula of the compound could then be
AB
None of these
Which of the following is an amorphous solid?
NaCl
Diamond
Glass
The limiting radii ratio for the tetrahedral geometry is
0.155
0.444
0.732
0.225
Kinetic theory of gases postulates :
The molecules in a gas are in stationary state
The molecules in a gas exert appreciable attraction on each other
The molecules move in a random motion with widely different velocities
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
When an ideal gas undergoes unrestricted expansion, no cooling occurs because the molecules
are above inversion temperature
exert no attractive force on each other
do work equal to loss in kinetic energy
collide without loss of energy
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
be enlarged
be collapse
remain unchanged in size
have half its volume of the gas
The molecular weight of a volatile liquid can be determined by
Dumas' method
Victor Meyer's method
Cryoscopic method
Osmotic pressure
According to Avogadro's hypothesis equal volumes of two gases under the same conditions of temperature and pressure contain
Equal number of electrons
Equal number of ions
Equal number of atoms
Equal number of molecules
The vapour density of gas A is four times that of gas B. If the molecular weight of gas B is M, then the molecular weight of gas A is
2M
4M
8M
M/4
In fluorite structure coordination number of calcium ions is
4
6
8
3