Question # 1

The Rutherford experiment of using a stream of alpha particles on a piece of gold foil proved that.

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The atom was a solid sphere

The atom had electron

The atom had neutrons

The atom had a great empty space in it

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

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 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

After 3 half life of a chemical reaction, amount of reactant un reactive will be.

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50%

25%

12.5%

6.25%

What amount of NaOH is required to prepare 500 g of 0.5 molal solution.

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10 g

20 g

30 g

40 g

The number of bonds in nitrogen molecules is.

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One pi and one sigma

One pi and two sigma

Thre sigma only

Two pi and one sigma

When external pressure is 23.7 torr, boiling point of water is

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100 ^oC

200^oC

98^oC

25^oC

Velocity constant is the rate of reaction when the concentrations of reactants are

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Zero

Unity

Two

Three

Which one of the following has the same number of electrons as an alpha particle.

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H

He

H+

Li+

In which compound the oxidation number of Mw is +6

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KMnO4

K2MnO4

MnO2

MnO

Which acid has less value of pKa.

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CH3COOH

H2S

H2CO3

HCl

Azeotrpic mixture of two liquids boils at a lower temperature than either of them, when

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It is saturated

Is shows positive deviation from Raoult's law

It shows negative deviation from Raoult's law

Is is metastable

Which is pseudo solid

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CaF2

Glass

NaCl

CaCl2

During the electrolysis of molten NaCI, the ion which is reduce is

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the value of delta H and delta E for liquids and solids is almost same because.

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No change in temperature

Heat absorbed

No change in volume

Heat evolved

The optimum temperature for the synthesis of NH3 by Haber's process is.

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200 ^oC

300 ^oC

400 ^oC

500 ^oC

When an ionic compound is dissolved in water, it dissociate into positive and negative ions, which are surrounded byH2O molecule, This process is known as.

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Hydrolysis

Hydration

Saturation

solvolysis

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