Question # 1

Which has greater enthalpy of vaporization

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F2

Cl2

Br2

I2

Solubility curve of CaCl26H2O shows

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Decrease in solubility with increase of temperature

Increase in solubility with increase of temperature

Discontinuous increase in solubility with temperature

No effect of temperature on solubility

For a given process, the heat chagnes of constant pressure and at constant volume are related to each other as.

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qp= qv

qp<qv

qp>qv

None of these

The wave number of the light emitted by a certain source is 2 x 10⁶ m-1 . The wavelength of this light will be.

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500 nm

5000 nm

200 nm

5 x10⁷ m

Which properties of liquid is measured by polarimeter

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Conductance

Refractive index

Optical activity

Change in volume

Energy and wavelength of a photon are related as.

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Direct

In direct

No correlation

Inverse under root

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.

Which technique is used ot determine the absorption of radiations.

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Spectrometry

dilatometer method

Refractometric method

Optical rotation method

What happens to the enthalpy change when the coeffficients of a chemical equation are douubled

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It doubles

It becomes half

It does not change

It cannot be predicted

One of the following liquids has lowest vapour pressure at 32°C. Indicate that liquid

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Ether

Chloroform

Ethanol

Water

The repulsion of electronic clouds of the molecules are responsible for the attractive forces among the molecules. These forces are

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Dipole-induced dipole forces

Ion-dipole forces

Instantaneous dipole-induced dipole forces

Dipole-dipole forces

Whenever a reaction is endothermic, then it means that

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Heat is transferred from surrounding to the system

Heat is transferred system to the surrounding

Heat content of the product is greater than that of reactants

Heat content of the reactants is greater than the products

Which mixture of gases is used by the deep sea divers.

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Oxygen and nitrogen

Oxygen and helium

Oxygen and carbon di oxide

Oxygen and water vapours

The velocity of photon is.

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Depends on its source

Equal to square of its amplitude

Depends on its wavelength

Independent of its wavelength

The pH of human blood is

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7.0

7.4

4.0

6.5

Which statement is incorrect about order of reaction

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It cannot be determined experimentally

It is determined experimentally

Sum of exponents in rate equation

It can have fraction value

A solution of glucose is 10% The volume in which 1 g mole of it dissolved will be.

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1 dm3

1.8 dm3

900 cm3

200 cm3

10 g of NaOH has been dissolved per dm3 of solution. The molarity of solution is.

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0.5 M

0.25 M

1 M

2 M

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