Question # 1

The largest number of molecule are present.

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3.6 g of H2O

4.6 g of C2H5OH

2.8 g of CO

5.4 g of N2O5

In Al2O3, the ratio between the ions is

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1 :2

2:1

2:3

3:2

Polymorphic substances have

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Same physical and chemical properties

Different physical and chemical properties.

Same physical but different chemical properties

Different physical and same chemical properties.

From which quantum number is the shape of an orbital determined.

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Principal

Magnetic

Azimuthal

Spin

Amorphous solids.

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Have sharp melting points.

Undergo clean cleavage when cut with knife

Have perfect arrangement of atoms

Can possesses small regions of orderly arrangement of atoms.

Which technique is used ot determine the absorption of radiations.

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Spectrometry

dilatometer method

Refractometric method

Optical rotation method

Pressure remaining constant, at which temperature the volume of a gas will become twice of what it is at 0 ^oC

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546 ^oC

200 ^oC

546 K

273 K

During paper chromatography, the stationary phase is.

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Solid

Liquid

Gas

Plasma

If absolute temperature of the gas is doubled and the pressure is reduced to one half the volume the gas will.

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Remains uncharged

Increase four time

Reduce to 1/4

Be doubled

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 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

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Heat of reaction

Heat of sublimation

Heat of neutralization

Heat of combustion

Colligative properites are the properties of

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Dilute solutions which behave as nearly ideal solution

Concentrated solution which behave as nearly non-ideal solution

Both a and b

Neither a nor b

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

NaCI is face centered cubic structure. The Na ion at the face of the unit cell is shared by

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2-unit cells

4-unit cells

Only one unit cell

8-unit cells

Which statement about a molecule is incorrect.

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It exist independently

Molecules of a substances are similar

Hemoglobin is a homoatomic molecules

Oxygen molecule is a macromolecule

Which one of the following relationship is correct about energy and frequency.

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E = hv

E = h/v

E = v/h

h = v/E

10 g of NaOH have been dissolved per kg of solvent The molality of solution.

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0.25 m

0.5 m

1.0 m

2.0 m

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