Question # 1

Which is not use of electrochemical series.

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Feasibility of reaction

Measurement of EMF of cell

Comparison of reactivity with water or acids

Determination of atomic and ionic radii

In which , case particles are separated from each other.

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Fusion

Condensation

Neutralizations

Vaporization

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Fe is reduced

Fe is oxidized

CI₂is oxidized

None of these

The number of moles of acid or base required by one dm³of buffer to alter its pH by one unit is called

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Buffer efficiency

Buffer capacity

Buffer action

None

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1

2

3

None of these

How many balloon of 0.25 dm3 capacity at 1 atmospheric pressure can be filled from a hydrogen gas cylinder of 5 dm3 capacity at 10 atmospheric pressure.

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50

90

180

200

Which of the following solutions has the highest boiling point

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5.85% solution of sodium chloride

18.0% solution of glucose

6.0% solution of urea

All have the same boiling points

Molecule in which the distance between two carbon atoms in the largest is.

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C2H6

C2H4

C2H2

C6H6

The molecules of a gas show more deviation from ideal behaviour at low temperature, because

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Attractive force dominate at low temperature

Kinetic energies are increased

Collisions become less frequent

Densities of the gases increase

The mass of one mole of electrons is.

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1.008 mg

0.55 mg

0.184 mg

1.673 mg

18 g glucose is dissolved in 90 g of water. The relative lowering of vapour pressure is equal to.

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1/5

5.1

1/51

6

Which liquid has low boiling point with.

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Less intermolecular force and higher V.P

Greater intermolecular forces and low V.P

Bigger size and greater polarizability

High hydrogen bonding in it

Quantum number values for 2p orbitals are.

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n = 2, 1 =1

n =1, 1 = 2

n =1, 1= 0

n = 2, 1 = 0

Which is not decay product of free neutron

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Proton

Electron

Neutron

Antineutrino

Ionic solid are characterized by.

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Low melting point

Good conductivity in solid state

High vapours pressure

solubility in polar solvent

In electrolysis of aqueous NaCl, Cl-ions are.

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Oxidized at anode

Oxidized at cathode

Reduced at cathode

Neither oxidized nor reduced

The sum of mole percent of all the components of solution is always equal to.

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Unity

100

Less than one

Less than 100

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 component

Equal to the total volume of the components

None of these

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