Question # 1

The distillation of a solution under reduced pressure is called

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Fractional distillation

Destructive distillation

Distillation

Vacuum distillation

During combustion analysis, CO2 produced is absorbed in

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Mg (CLO4)2

50% KOH

CaCl2

P2O5

How should the condition be changed to prevent the volume of a given gas from expanding when its mass is increased

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Temperature is lowered and pressure is increased

Temperature is increase and pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

When water freezes at 0 ^oC, its density decrease due to.

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Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

The cell in which a non spontaneous redox reaction takes place as a result of electricity is known as.

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Voltaic cell

Denial cell

dry Cell

Electrolytic cell

Solvent extraction method is a particularly useful technique for separation when the product to be separated is.

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Non volatile or thermally unstable

Volatile or thermally stable

Non volatile or thermally stable

Volatile or thermally unstable

A solution of sucrose is 34.2% The volume of solution containing one mole of solute.

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500 cm3

1000 cm3

342 cm3

3420 cm3

A limiting reactant is one.

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Which is present in least amount

Which produces minimum number of moles of product

Which produces maximum number of moles product

Does not effect the amount of product.

The quantitative relationship between rate and concentration is given by.

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Law of mass action

Rate law

Both of these

Le Chatelier's principle

The boiling point of pure water at 1 atm pressure is.

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98^oC

100^oC

69^oC

120^oC

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

All radio active disintegration nuclear reaction are of.

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First order

Zero order

2nd order

Third order

Which of the following species has unpaired electrons in anti-bonding molecular orbitals

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O₂⁺²

N₂^-2

B₂

F₂

The rate of reaction determined at any given time is called.

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Average rate

Instantaneous rate

Spontaneous rate

Over all rate

Under which conditions of temperature and pressure will a real gas behave most like an ideal gas.

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Low temperature and how pressure

High temperature and high pressure

Low temperature and high pressure

High temperature and low pressure

Which of the given has hydrogen bonding.

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CH4

CCl4

NH3

NaCl

Standard hydrogen electrode has an arbitrarily fixed potential

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0.00 volts

1.00 volt

0.10 volt

None of these

How many moles of CO are present having 12.04 x 10²³molecules of CO2.

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0.5 mol

1.0 mol

1,5 mol

2.0 mol

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