Question # 1

The volume occupied by 1.4 g of N2 at S.T.P is

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2.24 dm3

22.4 dm3

1.12 dm3

112 cm3

Which of the following molecules has zero dipole moment

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NH₃

CHCI₃

H₂O

BF₃

Normal temperature and pressure (S.T.P) of gas rafers to

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273 K and 76 mm Hg

273° C and 760 mm Hg

273 K and 760 mm Hg

273° C and 76 mm Hg

Pressure remaining constant at which temperature the volume of a gas will become twice of what it is at 0° C

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546°C

200°C

546 K

273 K

The true representation for the units of rate constant K for the first order reaction

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sec^-1

mole dm^-3s

mole dm^-3s^-1

mole^-1dm⁺³s^-1

Dipole Moment of H2O is.

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1.61 D

1.85 D

0.95 D

1.49 D

Acetone and chloroform are soluble in each other due to.

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Intermolecular hydrogen bonding

Dipole dipole interaction

Instantaneous dipoles

All of the above

The Rutherford experiment of using a stream of alpha particles on a piece of gold foil proved that.

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The atom was a solid sphere

The atom had electron

The atom had neutrons

The atom had a great empty space in it

CO+ is an example of.

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Free radical

Cationic molecular ion

Anionic molecular ion

Stable molecule

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

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O2

N2

B2

F2

Which one of the following methods will be used to separate the mixture of NaCl and sand.

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Chromatography

Solvent extraction

Sublimation

Filtration

An aqueous solution of ethanol in water has vapour pressure.

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Equal to that of water

Equal to that of ethanol

More than that of water

Less than that of water

Which one of the following correctly describe the shape of NH3 molecules.

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tetrahedral

Pyramidal

Angular

Square planar

If we want to change O₂to O₂^-1The electron is to be placed in

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Colligative properties are used to determine the

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Freezing points

Boiling point

Atomic mass of an element

Molar mass of solute

The deviation of a gas from ideal behavior is maximum at.

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-10 ^oC and 5.0 atm

-10^oC and 2 atm

0^oC and 2 atm

100^oC and 2 atm

Cathode rays strike alumina and produce a ..........colour.

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Red

Blue

Yellow

Green

Salt of weak acid with strong base when dissolved in water gives.

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Acidic solution

Basic solution

Neutral solution

None of above

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