Question # 1

How many allotropic forms are present in carbon

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Two

Three

Four

Five

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

Which liquid has low boiling point with.

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Less intermolecular force and higher V.P

Greater intermolecular forces and low V.P

Bigger size and greater polarizability

High hydrogen bonding in it

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

Which pair of compound are isomorphic in nature.

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NaCl and KNO3

KNO3 and MgO

MgO and NaF

CaF and CaCO3

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

A pressure cooker reduces cooking time because.

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Heat is uniformly distributed

Boiling point of water rises

A large flame is used

Vapour pressure of liquid reduces

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

On which factor boiling point of a liquid depends.

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Amount of the liquid

Shape of the container of the liquid

Type of burner used for boiling

External pressure

Long chains of amino acids are coiled about one another into a spiral by

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Covalent bond

Ionic bond

Hydrogen bond

Van Der Waal's forces

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.

The lightest value of lattice energy is for which one of these ionic compounds.

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NaI

NaF

NaBr

NaCl

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

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

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

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5%

9%

10%

18%

Conductivity of metal decreases by increasing temperature because.

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Atoms are converted to ions

Atoms oscillates and hinder the movement of free electrons.

Ions are converted into atoms

Velocity of mobile electrons increases

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

Diamond is a bad conductor because.

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It has tight structure.

It has a high density

There is no free electron present in the crystal of diamond to conduct electricity

None of the above

Which of the following can form H-bonds

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NH₃

C₂H₆

NaCI

CHCI₃

Which is not use of liquid crystals.

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Temperature sensor

Liquid crystal display

Skin thermography

Energy supply in electrical devices.

The molecules of CO2 i dry ice form the.

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Ionic crystals

Molecular crystals

Amorphous

Covalent crystals

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

Crystal to diamond is.

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Ionic

Molecular

Covalent

Metallic

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

The nature of copper crystals is

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Metallic

Ionic

Covalent

Molecular

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Chemistry Fsc Part 1 Chapter 4 Online Test MCQs With Answers

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