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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

Correct Answer :

C. through which molecules move between two consecutive collisions


Related Questions

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4

Cubic close packed arrangement of ions is described as

A. ABC AB ABC.....

B. ABC ABC......

C. AB AB..........

D. ABC CBA...

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4

The ionic radii of Rb+ and Br- ions are 1.47 A° and 1.95 A°, respectively. The most probable type of geometry exhibited by RbBr on the radius ratio rule is

A. NaCl type

B. CsCl type

C. Zinc blende structure

D. Wurtzite structure

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4

A vessel containing 10 litre of air at atmospheric pressure is connected to an evacuated 9 litre vessel The resulting pressure will be

A. 2 atm

B. 31 atm

C. 0.526 atm

D. 52.6 atm

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4

Correct gas equation is

A. P1V1P2V2=T1T2

B. V1T2P1=P2T1T2

C. P1T1V1=P2T2V2

D. V1V2T1T2=P1P2

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4

The electrical conductivity of metals is of the order of

A. 1012ohm-1cm-1

B. 108ohm-1cm-1

C. 102ohm-1cm-1

D. 10-6ohm-1cm-1

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4

The vol. of 20 gm. of hydrogen at N.T.P. is

A. 22.4 litres

B. 112 litres

C. 12 litres

D. 224 litres

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4

All gases tend to show ideal behaviour

A. at low temperature and low pressure

B. at high temperature and high pressure

C. at high temperature and low pressure

D. at low temperature and high pressure

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4

The number of atoms in 0.004 gm of magnesium is close to

A. 36x   105

B.  1020

C. 5 x  1020

D. 6.02 x 1023

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4

Volume occupied by 1 gm equivalent of oxygen at NTP is

A. 22.4 litres

B. 2.24 litres

C. 5.6 litres

D. 11.2 litres

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4

Which of the following is an example of covalent network solid?

A. Sodium

B. Solid carbon dioxide

C. Sodium chloride

D. Silicon

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4

The number of tetrahedral and octahedral voids per atom in a crystal lattice are, respectively

A. 1,1

B. 2,2

C. 2,1

D. 2,6

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4

20 litres of hydrogen gas weighs about

A. 1.8 g

B. 3.6 g

C. 224 g

D. 12.2 g

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4

What is the vapour pressure of benzoyl chloride at its boiling point (197°C)?

A. 760 torr

B. 380 torr

C. 197 torr

D. None of these

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4

The kinetic theory of gases predicts that total kinetic energy of a gaseous assembly depends upon the

A. pressure of a gas

B. temperature of the gas

C. volume of the gas

D. pressure, temperature and volume of the gas

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4

1.The correct relationship representing the volume occupied by 44 gm of CO2 and 64 gm of  SO2 at constant temperahire and pressure:

A. V(CO2  ) > V(SO2)

B. V(CO2  ) = V(SO2)

C. V(SO2) > V(CO2  )

D. cannot be predicted

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4

Indicate the most viscous liquid of the following

A. propanol-2

B. 1.2, ethandiol

C. 1.2,3 propentriol

D. ethanol

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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

The number of molecules is 4.25 g of ammonia are approximately

A. 3.5 x 1023

B. 2.5 x 1023

C. 1.5 x 1023

D. 0.5 x 1023

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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

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4

Normal boiling points values are for NH3, - 34C, bromine 58°C, carbon tetrachloride 77°C and oxygen - 183°C. Which of these liquids has the highest vapour pressure at room temperature?

A. NH3,

B. Br2

C. CCl4

D. O2

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4

An element has atomic weight 24 and equivalent weight 11.9. Its valency is

A. 1

B. 2

C. 3

D. 4

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4

At a given temperature and pressure 2 volumes of A combine with 5 volumes of B to form 2 volumes of C, and 1 volume of A combines with one volume of B to form 2 volumes of D. Then the formula of C is

A. AB5

B. A5B2

C.  A2B5

D. AB

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4

The radii of A+ and X- are 95 pm and 181 pm respectively. Coordination number of A+ is expected to be

A. 8

B. 6

C. 4

D. 3

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4

Four 1 litre flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same temperature and pressure, the ratio of total number of atoms of these gases present in the different flasks would be

A. 3:2:2:1

B. 2:1:2:3

C. 1:2:2:3

D. 1:1:1:1

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4

In the ideal gas equation PV = nRT constant 'R' has the unit

A. joule

B. litre/mol

C. lit-atm/deg/mol

D. calorie/mole

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4

The vapour density of completely dissociated sociated NH4CL would be

A. Determined by the amount of solid NH4CL used in the experiment

B. Triple to that of NH4CL

C. Half of that NH4CL

D. Slightly less than half of that of NH4CL

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4

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

A. be enlarged

B. be collapse

C. remain unchanged in size

D. have half its volume of the gas

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4

To which of the following mixtures is the Dalton's law of partial pressures not applicable?

A. H2+O2

B. N2+O2

C. NO + O2

D. Xe + Ar

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4

The vol. of 20 gms of nitrogen at N.T.P.

A. 16 litres

B. 36 litres

C. 8 litre

D. 32 litres

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4

In anti-fluorite structure the negative ions

A. occupy tetrahedral voids

B. occupy octahedral voids

C. are arranged in ccp

D. are arranged in hcp