Question # 1

In order to mention the oiling point of water at 110 ^oC, the external pressure should be.

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Between 760 torr and 1200 torr

Between 200 torr and 760 torr

765 torr

Any value of pressure

In which system all the three axes are of equal length and all angles are at right angle.

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Cubic

Tetragonal

Orthorhombic

Hexagonal

The shape of diamond crystal is.

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cubic

Hexagonal

Tetragonal

Orthorhombic

The repulsion of electronic clouds of the molecules are responsible for the attractive forces among the molecules. These forces are

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Dipole-induced dipole forces

Ion-dipole forces

Instantaneous dipole-induced dipole forces

Dipole-dipole forces

Which of the given has hydrogen bonding.

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CH4

CCl4

NH3

NaCl

NH3 shows a maximum boiling point among the hydrides of the group V elements due to.

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Very small size of nitrogen

Long pair of electrons present on nitrogen

Enhanced electronegative character of nitrogen

Pyramidal structure of NH3

The number of Na, ions which surround each CI^1-ion the NaCI crystal lattice is

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8

12

6

4

Molecular crystals are generally

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Hard

Relatively soft

Unstable

do not exist

Which pair of molecule have Debye forces in them

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Ar and Ar

Argon and water

Na+ ions and water

water and water

Ionic solids are characterized by.

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Low melting points

High vapour pressures

Good conductivity in solid state

Solubility in polar solvents

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

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First

Second

Third

Fourth

The polarizabilities of elements mostly increase down the group due to the reason that

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The atomic numbers increase

Number of protons increase

Number of shells increase along, with increase of shielding effect

The behavior of the elements remain the same

Diamond is a bad conductor of electricity because

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It has a tight structure

It has a high density

There are no free electrons present in the crystal of diamond to conduct electronics

None of these

The boiling point of water at Murree Hills.

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90^oC

98^oC

100^oC

120^oC

The distillation of liquid under reduced pressure is called.

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Destructive distillation

Vaccum distillation

Simple distillation

Fractional distillation

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.

In which , case particles are separated from each other.

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Fusion

Condensation

Neutralizations

Vaporization

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Chemistry Fsc Part 1 Chapter 4 Online Test MCQs With Answers

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