Question # 1

Cathode rays strike alumina and produce a ..........colour.

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Red

Blue

Yellow

Green

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

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500 nm

500 m

200 nm

600 m

If the empirical formula of compound is CH2 and its molecular mass is 56 than what is the actual molecular formula of this compound.

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CH2

C2H4

C3H6

C4H8

Exceptionally low acidic strength of HF is due to.

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Strong polar bond between H and F

Smaller size of fluorine

Strong hydrogen bonding

electronegativity of fluorine

Unit of mole fraction is

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mol dm-3

mol kg-1

g dm-3

No unit

In zero order reaction the rate is independent of.

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Temperature of reaction

Concentration of reactants

Concentration of products

None of these

Bohr's model of atom, is contradicted by.

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Planck quantum theory

Pauli's exclusion prinsciple

Heisenberg's uncertainty principle

All of the above

Electrochemical series is the arrangement of the electrodes in

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Increasing order of reduction potentials

Decreasing order of reduction potentials

Increasing order of oxidation reduction potential

There is no fixed arrangement

Which one of the following orbital will be filled first.

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4f

5d

3d

4s

Diamond is a bad conductor of electricity because

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It has a tight structure

It has a high density

There are no free electrons present in the crystal of diamond to conduct electronics

None of these

Which is not chargeable cell

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Lead accumulator

NiCAD cell

Fuel cell

Alkaline battery

The effect of temperature on equilibrium was studied by

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Lewis

Van der wall

Arrhenius

Vant hoff

The unit of mole fraction is

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Moles dm^-3

Moles kg^-1

Gram dm^-3

None

Chlorine atom and chloride Cl- ions

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Have same chemical and physical properties

Are allotropes of chlorine

Have same number of electrons

Have same number of proton

Colligative properties are the properties of.

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Dilute solution which behave as nearly ideal solutions

Concentrated solutions which behave as nearly non ideal solutions

Both a and b

Neither a nor b

In methanol, bond between carbon and oxygen.

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Ionic

Non polar

Polar

Co - ordinate

Colligative properties are used to determine the

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Freezing points

Boiling point

Atomic mass of an element

Molar mass of solute

Dilatometer method is useful for the reactions that involve.

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Ionic species

Where reactant absorb U.V. visible or infrared radiations

Small volume changes in solutions

Change in refractive indices

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