Question # 1

In which , case particles are separated from each other.

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Fusion

Condensation

Neutralizations

Vaporization

When water freezes at 0°C, its density decreases due to

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Cubic structure of ice

Empty spaces present in the structure of ice

Change of bond lengths

Change of bond angles

When liquid water changes to ice its volume expands. The expansion in volume is.

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5%

9%

10%

18%

Which of the given has hydrogen bonding.

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CH4

CCl4

NH3

NaCl

Dipole-dipole forces are present among.

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Molecules of Iodine

Atoms of Neon i gaseous state

Chloroforms' molecules

CCl4 molecules

The molecule of CO2 in dry ice form the.

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Ionic crystals

Covalent crystals

Molecular crystals

Any type of crystals

The boiling point of pure water at 1 atm pressure is.

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98^oC

100^oC

69^oC

120^oC

Ionic solids are characterized by.

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Low melting points

High vapour pressures

Good conductivity in solid state

Solubility in polar solvents

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

In order to mention the B.P 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

Exceptionally low acidic strength of HF is due to.

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Strong polar bond between H and F

Smaller size of fluorine

Strong hydrogen bonding

electronegativity of fluorine

Ionic solid are characterized by.

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Low melting point

Good conductivity in solid state

High vapours pressure

solubility in polar solvent

When external pressure is 23.7 torr, boiling point of water is

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100 ^oC

200^oC

98^oC

25^oC

Which is pseudo solid

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CaF2

Glass

NaCl

CaCl2

The molecules of CO₂in dry ice form the

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Ionic crystal

Covalent crystals

Molecular crystals

Any type of crystals

The shape of diamond crystal is.

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cubic

Hexagonal

Tetragonal

Orthorhombic

The long chains of amino acids are coiled about one another onto a spiral by

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Ionic bond

Van der walls forces

Hydrogen bonding

Overlapping of orbitals

London dispersion forces 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

Molecules of solid iodine

Molecules of hydrogen chloride gas

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Chemistry Fsc Part 1 Chapter 4 Online Test MCQs With Answers

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