Cubic close packed arrangement of ions is described as
ABC AB ABC.....
ABC ABC......
AB AB..........
ABC CBA...
Correct Answer :
B. ABC ABC......
Related Questions
The number of atoms per unit cell in simple cubic, face centred cubic and body centred cubic arrangement are, respectively
8,14,9
1,2,4
1,4,2
8,4, 2
Kinetic gas equation is, PV =...
nRT
RT
How many nearest neighbours are there in an octahedral hole of a close packed structure
4
6
8
12
How many moles of water are present in 180 gm. of water ?
11
5
90
21
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
NaCl type
CsCl type
Zinc blende structure
Wurtzite structure
The number of atoms per unit cell in bcc arrangement is
1
4
3
2
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)?
64 gm of sulphur dioxide
4.4 gm of sulphur dioxide
6.4 gm of sulphur dioxide
3.2 gm of sulphur dioxide
Which of the following methods is used to determine the atomic weight?
Victor Meyer's method
Dumas' method
Cannizaro's method
None of these
In a solid atoms A are arranged in ccp array. Atoms B occupy all the octahedral voids and half the tetrahedral voids. The formula of the compound is expected to be
The V.D. of a gas is 11.2 gm. The volume occupied by 11.2 gm. of this gas at N.T.P. is
12 litre
11.2 litres
2.24 litres
22.4 litres
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
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
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
The vapour density of ozone would be
72
8
48
24
In a close packed arrangement of N spheres, the number of octahedral holes are
N
2N
4N
8N
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 ?
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
The vapour density of pure ozone would be
32
8
12
24
In the ideal gas equation PV = nRT constant 'R' has the unit
joule
litre/mol
lit-atm/deg/mol
calorie/mole
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
More number of a gas molecules strike the surface per second
Velocity of the gas molecules increases
Gas molecules attract each other
Weight of the gas increase with volume
Cubic close packed arrangement of ions is described as
ABC AB ABC.....
ABC ABC......
AB AB..........
ABC CBA...
An example of covalent solid is
diamond
NaCl
Copper
Absolute zero is the temperature at which
water freezes
all gases become liquid
all substances are solid
molecular motion ceases
The weight of 22.4 litres of any gas at N.T.P. represent its
gm atomic weight
gm molecular weight
gm equivalent weight
None of these
Avogadro stated that under similar conditions of temperature and pressure equal volumes of all gases contain equal number of
atoms
molecules
electrons
ions
The vapour density of completely dissociated sociated would be
Determined by the amount of solid used in the experiment
Triple to that of
Half of that
Slightly less than half of that of
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 statement wrong?
In solid state molecules, atoms or ions are held with a strong force of attraction and are in a fixed position
In liquid state the molecules, atom or ions are held with a strong force and have a restricted motion
In gaseous states, the molecules are randomly arranged and are apart from each other
Solid, liquid and gaseous states have different movement is particles
The vapour density of a gas is 11.2. The volume occupied by 2.4 g of the gas at S.T.P wil be
2.4 litres
3.6 litres
2.24 litres
11.2 liters
In a dose packed arrangement of N spheres, the number of tetrahedral holes are
N
2N
N/2