Question # 1

The born Haber cycle is the best application of law.

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Boyle's

Dalton's

Hess's

Graham's

Actual yield is mostly less than the theoretical yield due to the reason that

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Rates of reactions are slow

Loss of the product during handling

Reactions are never completed 100%

Law of conservation of mass is not true

Which statement is incorrect about Dempster's mass spectrometer.

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Solid sample can be used in this mass spectrometer

Ions are detected on the basis of mass to charge ratio

Atoms or molecules are ionized with beam of electron.

This spectrometer work at one atmospheric pressure.

A filtration process could be very time consuming if it were not aided by a gentle suction, which is developed.

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If the paper covers the funnel up to its circumference

If the paper has got small sized pores in it

If the stem of the funnel is large so that it dips into the filtrate

If the paper fits tightly

Which is not use of electrochemical series.

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Feasibility of reaction

Measurement of EMF of cell

Comparison of reactivity with water or acids

Determination of atomic and ionic radii

In order to mention the B.P. of water at 110°C, the external pressure should be

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

760 torr

Any value of pressure

Which of the following is psuedo solid

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CaF2

Glass

NaCl

All

Noon has low critical temperature and pressure as compared to other gases. the most probable reason is that

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Its octet is complete

It is a monoatomic gas

It has very low polarizability

It has least forces of attraction

The voltage Nickel Cadmium cell is

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1 V

1.2 V

1.4 V

1.6 V

One mole of ethanol and one mole of ethane have an equal

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Masses

Number of atoms

Number of electrons

Number of molecules

According to Boyle's law which parameters give a straight line parallel to x -axis when we plot a graph between

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P and V

P and 1/V

P and PV

V and T

I molar volume of a gas at S.T.P is occupied by

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1 g of gas

6 x 10²³g of gas

22.4 m³of gas

1 gram molecular mass of gas

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

In which one of the following pairs do the molecule have similar shape.

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BF3 and AlCl3

CO2 and H2O

CH4 and PH3

NH3 and BCl3

At which distance a molecule is present from its neighbor molecules of its own diameter, at room temperature.

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100 times

200 times

300 times

400 times

Which one of the following relationship is correct about energy and frequency.

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E = hv

E = h/v

E = v/h

h = v/E

Which bond has more ionic characters in it.

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C - F

N - F

O - F

F - F

Several types of filter media are used for filtration depending on

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Natural of reactants

Nature of reaction

Size of precipitate

Nature of filter paper

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