Question # 1

Orbitals having same energy are called

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Hybird orbitals

Valence orbitals

Degenerate orbitals

D-orbitals

Calcium has isotopes

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7

9

1

6

Most of the reaction which give stable products are

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Exothermic

Endothermic

Isothermal

None of these

A solution have H+ ions concentration 1 x 10^-7 , its pH will

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Acidic

Basic

Neutral

Zero

In endothermic reactions, the heat content of the

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Products is more then that of reactants

Reactants is more than that of products

Both a and b

Reactant and products is equal

The deviation of a gas from ideal behaviour is maximum at.

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-10 ^oC and 5.0 atm

-10 ^oC and 2.0 atm

100 ^oC and 2.0 atm

0 ^oC and 2.0 atm

In which of the following Paris, do the elements form a compound by sharing electrons.

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carbon and chlorine

Lithium and iodine

Neon and oxygen

Potassium ad bromine

The nature of positive rays depends on

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The nature of electrode.

The nature of discharge tube

The nature of residual gas

All of the above

Which one of the following orbital will be filled first.

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4f

5d

3d

4s

If an endothermic reaction is allowed to take place very rapidly i the air, the temperature fo the surrounding air.

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Remains constant

Increase

Decrease

Remain unchanged

De Broglie equation treats electron to be.

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A particle

Wave

Both particle and wave

None of these

12.04 x 10²³atoms of nitrogen gas is equal to.

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1 mol

2 mol

3 mol

4 mol

Which of the following molecule has zero dipole moment.

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NH3

CHCl3

H2O

BF3

In azeotropic mixture showing positive deviation from Raoult's law the volume of the mixture is

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Slightly more than the total volume of the components

Slightly less than the total volume of the components

Equal to the total volume of the components

None of these

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

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

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-4

-2

+2

+4

Chromatographic technique is very useful for

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Isolation

Purification

separation

All of them

the volume occupied by 1.4 of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

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