Question # 1

If the volumes of reactants and products are same in a gaseous phase reaction, then the equilibrium state is not affected by

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Change of temperature

Change of pressure

Change of concentration

Catalyst

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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

If a strip of Cu metal is placed in a solution of FeSO₄

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Cu will be precipitated out

Fe is precipitated out

Cu and Fe both dissolve

No reaction takes place

The mass of one mole of electrons is.

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1.008 mg

0.55 mg

0.184 mg

1.673 mg

How should the condition be changed to prevent the volume of a given gas from expanding when its mass is increased

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Temperature is lowered and pressure is increased

Temperature is increase and pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

The drying agents used in desiccator is.

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BeCl2

MgCl2

CaCl2

SrCl2

The separation of the different isotopes in the mass spectrometer is done on the basis of

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Different amounts of positive changes

Charge e/m value different amounts of negative changes

Different m/e value

Velocities of the ions

Spectrum produced due to the transition of electron from M-Shall to L-Shell is.

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Absorption

Emission

Continuous

X rays

Fuel cells are mostly used in space air crafts as the source of.

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Power only

Drinking water

Drinking water and power

Fuel and drinking water

Gas molecules show more deviation from ideal behaviour at high pressure because.

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Velocity of molecules increases

Velocity of molecules decreases

Force of attraction between molecules increases

Force of collision per unit area increases

What is the oxidation state of sulphur in SO3^2-

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-4

-2

+2

+4

Which one of the following process is endothermic

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condensation of steam

Freezing of water

electrolysis of water

None of these

The polarizabilities of elements mostly increase down the group due to the reason that

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The atomic numbers increase

Number of protons increase

Number of shells increase along, with increase of shielding effect

The behavior of the elements remain the same

Which statement is incorrect about 64 g of SO2.

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It is one mole SO2

The number of SO2 molecule are 6.02 x 10²³

The number of oxygen atoms are 6.02 x 10²³

The number sulphur atom are 6.02 x 10²³

Which concentration unit is independent of temperature.

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Molarity

Molality

ppm

both a and b

In chromatographic technique. Rf has unit.

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Mol dm-3

Cm

m3

No units

How many sigma and pi bonds are present in C2H2.

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one sigma and two pi

two pi and one sigma

Two pi and three sigma

Three pi and two sigma

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