Question # 1

Cadmium has isotopes.

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3

4

5

9

Maximum number of electrons in f-subshell is.

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2

6

10

14

Chromatography is the process which involve the distribution of a solute between

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Two mobile phases

A stationary phase and mobile phase

Two stationary and two mobile phases

Two stationary phases

Gases of air, always remains in the random motion and do not settle due to.

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Elastic collision of gas molecules

Unequal number of different gas molecules

Difference impartial pressure of gas molecules

Difference in molecular masses of air gases

The shape of Sncl2 molecule is.

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Linear

Angular

Trigonal planar

Tetrahedral

To achieve a good separation, the two liquids are gently shaken to increase their area of.

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Miscibility

Separation

contact

Solubility

Forces of attraction between He atoms are.

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Hydrogen bonding

London forces

Debye forces

Ion dipole forces

In endothermic reactions, the heat content of the.

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Products is more than that of reactants.

Reactants is more than that of products

Both a and b

Reactants and products are equal

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

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HF

HCl

H2O

H2

If reactants have very low activation energy it means that reaction is.

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Slow

Fast

Endothermic

Exothermic

How should the conditions be changed to prevent the volume of a give gas from expanding when its mass is increased.

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Temperature is lowered and pressure is increased.

Temperature is increased and pressure is lowered

Temperature and pressure both are lowered

Temperature and pressure both are increased

The iodine present in water can be separated by which one of the following techniques

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Sublimation

Chromatography

Filtration

Solvent extraction

The diffusion of gases at absolute zero will be

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Unchanged

Zero

slightly decreases

Slightly increases

The comparative rates at which the solutes move in paper chromatography, depends on

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The size of paper used

Their R_fvalues

Their partition coefficients

The polarity of solvent used

The over all positive value for the reaction potential predicts that process is energetically.

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Not feasible

Feasible

Impossible

No indication

Oxidation number of Cr in a C₂CrO₄ is

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+2

+4

+6

+8

The cathodic reaction in the electrolysis of dill. H₂SO₄with Pt electrodes is

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Reduction

Oxidation

Both oxidation and reduction

Neither oxidation nor reduction

Which statement is incorrect about 64 g of SO2.

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It is one mole SO2

The number of SO2 molecule are 6.02 x 10²³

The number of oxygen atoms are 6.02 x 10²³

The number sulphur atom are 6.02 x 10²³

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