Question 1

Which of the following paired atoms is non-polar?

Accepted Answer

H-P

Answer

H-F

Answer

Br-F

Answer

H-Cl

Question 2

Which of the following bonds has the highest polarity?

Accepted Answer

O-H

Answer

N-H

Answer

C-O

Answer

C-H

Question 3

Which of the following bonds has the lowest polarity?

Accepted Answer

C-H

Answer

O-H

Answer

N-H

Answer

C-O

Question 4

Which of the following is the correct decreasing electronegativity values?

Accepted Answer

F, O, N, C

Answer

H, Si, P, S

Answer

Cl, S, Si, P

Answer

As, Se, Br, F

Question 5

Which molecule has an ionic bond?

Accepted Answer

Na-F

Answer

H-F

Answer

F-F

Answer

Cl-F

Question 6

Which statement is true about the non-polar molecules?

Accepted Answer

They are symmetric

Answer

They have lone pair on the central atom

Answer

They have charges

Answer

They are asymmetric

Question 7

If a molecule has this symbol &-, it means_______.

Accepted Answer

Negative

Answer

Positive

Answer

Neutral

Answer

cancel out

Question 8

If a molecule has this symbol &+, it means_______.

Accepted Answer

positive

Answer

charge

Answer

negative

Answer

neutral

Question 9

If a molecule has value of 1.6 electronegativity difference, this molecule is best described as________.

Accepted Answer

Polar

Answer

Non-Polar

Answer

Ionic

Answer

Covalent

Question 10

Which of the following IMFAs is considered as the weakest?

Accepted Answer

London forces

Answer

Ion-dipole

Answer

H-bonding

Answer

Dipole-dipole

Question 11

The boiling point of water is greater than dihydrogen sulfide because of ______.

Accepted Answer

H-bonding

Answer

London dispersion

Answer

Dipole-dipole bond

Answer

Ion- dipole

Question 12

Which of the following substances will dissolve most likely in water?

Accepted Answer

Vinegar (CH3COOH)

Answer

Hexane (C6H14)

Answer

Carbon tetrachloride (CCl4)

Answer

Oil

Question 13

Which of the following molecules has high melting point?

Accepted Answer

CHCl3

Answer

BeCl2

Answer

CCl4

Answer

BCl3

Question 14

This refers to the energy required to increase the surface area by a unit amount.

Accepted Answer

Surface tension

Answer

Viscosity

Answer

Density

Answer

Vapor pressure

Question 15

Which of the following statements is TRUE about nonpolar molecules

Accepted Answer

Have low surface tension

Answer

Have low vapor pressure

Answer

Have high boiling point

Answer

Have high melting point

Question 16

The following are intermolecular forces of attraction EXCEPT:

Accepted Answer

Covalent bond

Answer

London forces

Answer

Dipole-dipole

Answer

H-bond

Question 17

Which of the following properties has indirect relationship with the strength of IMFA?

Accepted Answer

Vapor pressure

Answer

Surface tension

Answer

Melting point

Answer

Boiling point

Question 18

H-bonds are broken when ice melts.

Accepted Answer

false

Answer

true

Question 19

Molecules with H-bonds have higher boiling point than molecules with dipole-dipole bond

Accepted Answer

true

Answer

false

Question 20

In covalent molecules, vapor pressure decreases with decreasing strength of intermolecular forces.

Accepted Answer

false

Answer

true

Question 21

When the attractive forces holding particles together are greater, you have to get to a higher temperature to break those forces, so the melting point is higher.

Accepted Answer

true

Answer

false

Question 22

What is true about intermolecular forces?

Accepted Answer

They are stronger than the intramolecular forces between atoms.

Answer

They are strong bonds that form between atoms of molecules.

Answer

There is a vague relationship between intermolecular forces and bulk properties

Answer

Substances can form more than one but one will predominate.

Question 23

Why are dispersion forces high in molecules with great number of electrons?

Accepted Answer

The electron distribution of big molecules is easily polarized

Answer

The electrons in the molecules can easily jump from one orbital to another.

Answer

The nucleus in the molecules has greater effective shielding effect.

Answer

The electrons move freely around the nucleus resulting to greater energy

Question 24

H-bonding forms when the substances involved are polar and have molecules with

Accepted Answer

H-atoms attached to O, N, F.

Answer

unshared pair of electrons in the central atom.

Answer

C-atoms attached to O, N, F

Answer

central atoms with O, N, F as attached atoms

Question 25

How does dipole-dipole interaction happen?

Accepted Answer

The (-) and (+) ends of one polar molecule align themselves to the (+)and (-) ends of another polar molecule and attract each other.

Answer

Polarization of big nonpolar molecules brings about the formation of permanent (+) and (-) charges.

Answer

The electron distribution in the polar molecules is distorted that results to (-) and (+) poles.

Answer

Polar molecules shift electron density that gives rise to neutral substances.

Question 26

The properties of matter seen in the macroscopic level influenced by intermolecular forces

Accepted Answer

Bulk

Answer

covalent

Answer

individual

Answer

ionic

Question 27

Cohesive forces bring about capillary action. These forces are

Accepted Answer

drawing together of the same kind of molecules.

Answer

pulling molecules towards gravity

Answer

attractions among different molecules.

Answer

interactions among polar molecules.

Question 28

When adhesion is stronger than cohesion, the liquid is pulled

Accepted Answer

upward and becomes higher than the surrounding liquid.

Answer

downward and becomes higher than the surrounding liquid

Answer

upward and results to concave meniscus

Answer

downward and results to convex meniscus.

Question 29

What is true of viscosity of substances?

Accepted Answer

Molecules that form H-bonds have higher viscosities than those with London dispersion forces.

Answer

Substances with London dispersion forces exhibit greater viscosity than those with ion-dipole interactions

Answer

The least viscous substance flow the slowest among the substances

Answer

Viscosity of substances increases as the temperature increases.

Question 30

The vapour pressure on top of the mountain is low so what will happen to the cooking time of an egg up there?

Accepted Answer

The cooking time will be shorter since the temperature of the water is lower.

Answer

The cooking time will be longer since the temperature of the water is lower

Answer

The cooking time will be longer since the temperature of the water is higher

Answer

The cooking time will be shorter since the temperature of the water is higher

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