Question # 1

The number of bonds in nitrogen molecule is

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One o and oneπ

One o and twoπ

Three sigma only

Two o and twoπ

VSEPR theory was proposed by

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Nyholn and Gillespie

Kossel

Lewis

Sidwick

Which of the following represents electronic configuration of the most electropositive elements

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He [ 2s^-1]

Xe [6s¹]

He [2s²]

Xe [6s²]

In solvent extraction, solute can be separated from solution, by shaking the solution with solvent in which the solute is.

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More soluble

Partially soluble

Insoluble

soluble at high temp

In which de excitation of electron of hydrogen atom maximum energy is relaeased.

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From n2 to n1

From n3 to n2

From na to n1

From na to n2

Acetone and chloroform are soluble in each other due to

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Intermolecualr hydrogen bonding

Dipole-dipole interaction

Instantaneous dipoles

All of the above

Fuel cells are the means by which chemical energy may be converted into

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Heat energy

Magnetic energy

Sound energy

Electric energy

Dipole moment of CO2 is.

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1.25 D

1.85 D

3.1 D

Zero

The enthalpy of combustion is

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Positive

Negative

Either positive or negative

No correlation

In a period of periodic table, atomic radii

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Increases

Decreases

Remain same

First decreases than increases

Dipole moment is defined as.

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Charge x distance

Charge x Debye

Charge x displacement

Charge x bond energy

London dispersion force are the only forces present among the.

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Molecules of water in liquid state

Atoms of helium in gaseous state at high temperature

Molecule of solid iodine

Molecules of hydrogen chloride gas

The cathodic reaction in the electrolysis of dil H2SO4 with Pt electrodes is.

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Reduction

Oxidation

Both oxidation or reduction

Neither oxidation nor raduction

According to classical concept, oxidation involves

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Addition of oxygen

Addition of electron

Removal of hydrogen

All are correct

n+1 value of 6d orbital is.

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08

09

10

18

Cathode rays cast shadow when an opaque object is placed in their path. This behavior of cathode rays show that.

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They move is straight line

They are negatively charge

They possess momentum

They are energetic

Which of the following molecules have unpaired electrons is the bonding molecular orbitals.

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N2

O2

B2

F2

A glass is full of water and contains 6.02 x 10²³molecules of H2O The mass of water molecules is.

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18 gm

90 g

120 g

180 g

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