Question # 1

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 molar volume of CO2 is maximum at.

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STP

127 ^oC and 1 atm

0 ^oC and 2 atm

273 ^oC and 2 atm

In cubic and hexagonal closest packing which layer has different arrangement.

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First

Second

Third

Fourth

The rate of diffusion of a gas of molar mass 72 as compared to H2 will be.

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1/6 times

1.4 times

6 times

same

Which is not used as drying agent in a desiccator.

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Cacl2

NaCl

P2O5

Salica Gel

In a period of periodic table, atomic radii

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Increases

Decreases

Remain same

First decreases than increases

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

The molecular shape of SO3 is.

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Triangular planar

Tetrahedral

Pyramidal

Linear

______ Molecule has zero dipole moment.

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CO

H2S

SO2

CH4

The oxidation of O -atom in OF3 is.

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-2

+2

-1

+1

Anode rays were discovered by

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J. Stoney

Rutherford

J.J. Thomson

Goldstein

Oxidation number of carbon in NaHCO₃

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+4

-6

+6

+2

Rutherford's model of atom failed because

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The atom did not have a nucleus and electrons

It did not account for the attraction between protons and neutrons

It did not account for the stability of the atom

There is actually no space between the nucleus and the electrons

The carbon atom is C2H4 is.

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sp3 hybridized

sG2 hybridized

Sp hybridized

dsG2 bybridized

The velocity of photon is

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Independent of its wavelength

Depends on its wavelength

Equal to square of its amplitude

Depends on its source

The molarity of 2% w/v NaOH solution is

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2

0.25

0.05

0.5

The paramagnetic behaviour of oxygen is well explaned on the basis of.

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M.O Theory

N.B Theory

VSEPR Theory

CF theory

a zero order reaction is one is which

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Reactants do not react

One reactant is in large excess

Concentration of reactant do not change with passage of time

Rate is of affected by changing concentration of reactants

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