Question # 1

The concept of distribution of velocities among the gas molecules was given by.

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Clausius

Mexwell

Boltzmann

Vander waal

The rate of diffusion of a gas of molar mass 72 as compared to H2 will be.

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1/6 times

1.4 times

6 times

same

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

Allotropy is the property of.

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Compound

Element

Atom

Mixtuer

Molal boiling point elevation depends upon

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Nature of solvent

Natrue of solute

Vapour pressure of solution

None of these

Solvent extraction is an equilibrium process and it is controlled by

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Law of mass action

The amount of solvent used

Distribution law

The amount of solute

The unit of rate constant is same as that of rate of reaction in

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first order reaction

Second order reaction

Third order reaction

Zero order reaction

Which one of the following gases diffuse more rapidly.

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Cl2

CO2

CH4

N2

The mass fo 1.505 x 10²³atoms of sulphur is.

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0.5 g

0.6 g

0.7 g

0.8 g

The ration of number of molecules of 2 g H2 g to number of molecules of 64 g gaseous oxygen is.

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1:1

1:2

1:32

1:4

The nature of copper crystals is

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Metallic

Ionic

Covalent

Molecular

In chromatographic technique. Rf has unit.

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Mol dm-3

Cm

m3

No units

NaCI is face centered cubic structure. The Na ion at the face of the unit cell is shared by

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2-unit cells

4-unit cells

Only one unit cell

8-unit cells

The number of bonds in nitrogen molecule is

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One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

The mass of two moles of electrons is

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1.10 mg

1.008 mg

0.184 mg

1.673 mg

In a solution 7.8 g of benzene and 46 g of toluene is present The mole fraction of benzene is.

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1/2

1/3

1/5

1/6

During paper chromatography, the stationary phase is.

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Solid

Liquid

Gas

Plasma

Which element has highest ionization potential.

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Li

B

Be

C

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