Question # 1

The volume occupied by 1.6 g of O₂at STP is

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22.4 dm³

2.24 dm³

1.12 dm³

112 dm³

Fluorine molecule (F₂) is formed by the overlap of

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s - s orbital

s - p orbital

p - p head on overlapping of orbitals

p - p parallel overlapping of orbitals

The diffusion of gases at absolute zero will be

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Unchanged

Zero

slightly decreases

Slightly increases

The concept of distribution of velocities among the gas molecules was given by.

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Clausius

Mexwell

Boltzmann

Vander waal

Upper consulate temperature for water phenol system is.

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150 ^oC

65.9 ^oC

120 ^oC

130 ^oC

Which one of the following has the greater ionic characters in it.

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HF

HCl

H2O

H2

Quantum number value for 2p sub shell are

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n = 2, I = 1

n = 1, l =1

n = 1, l = 0

n = 2, l = 0

In order to mention the B.P of water at 110 ^oC the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

The rate of reaction

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Increases as the reaction proceeds

Decreases as the reaction proceeds

Remains the same as the reaction proceeds

May decrease or increase as the reaction proceeds

Solvent extraction is an equilibrium process and it is controlled by.

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Law of mass action

The amount of solvent used

Distribution law

The amount of solute

The number of bonds in nitrogen molecule is

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One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

Electrolysis is used for

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Electroplating

Refining of copper

Manufacture of caustic soda

All of the above

Allotropy is the property of.

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Compound

Element

Atom

Mixtuer

Which element has highest ionization potential.

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Li

B

Be

C

Equal masses of methane and oxygen are mixed in an empty container at 25°C, the fraction of total pressure exerted by oxygen is

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1/3

8/9

1/9

16/17

When small amount of acid or base is added to buffer, its pH.

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Remain same

Always increases

Always decreases

slightly increases or decreases

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Heat of reaction

Heat of sublimation

Heat of neutralization

Heat of combustion

Which one of the following gases cannot be liquefied by Line's method.

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Water vapours

NH3

Nitrogen

H2

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