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H Unit 1 Revision

Total questions: 79

Worksheet time: 3hrs 38mins

Name
Class
Date
1.

What is the tendency of an atom to attract electrons towards itself?

a)

atomic radius

b)

ionization energy

c)

shielding

d)

Electronegativity

2.
The higher the ionization energy...
a)
the more attracted the valence electron is to the nucleus
b)
the less attracted the valence electron is to the nucleus
c)
the more attracted the valence electron is to another electron
d)
the less attracted the valence electron is to another electron
3.
Why does ionization energy decrease going down a group?
a)
Adding more energy levels makes the ve- further from the nucleus
b)
There are more valence electrons in the outer shell
c)
There are more protons  in the nucleus
d)
There are less protons in the nucleus
4.
Why does electronegativity increase across a period?
a)
Adding more energy levels makes the ve- further from the nucleus
b)
There are more valence electrons in the outer shell
c)
There are more protons  in the nucleus
d)
There are less protons in the nucleus
5.

What happens to atomic radius across a period?

a)

the atoms get bigger because the nucleus is bigger as more protons are added

b)

the atoms get bigger because there are more ve-

c)

the atoms get smaller because with more attraction to the extra protons, the e- cloud moves closer to the nucleus

6.

What can you infer about elements that are in the

same group?

a)

They will have the similar chemical properties.

b)

They will contain the same number of protons.

c)

They will display similar atomic masses.

d)

They will emit X rays of similar frequency.

7.
The minimum energy required to remove an electron from the ground state of an atom
a)
electron configuration
b)
energy levels
c)
ionization energy
d)
ionic bond
8.
Which of these is covalent?
a)
NaCl
b)
Pb(NO3)2
c)
CO2
d)
AlCl3
9.

What type of bonding exists in helium?

a)

Covalent

b)

Diatomic

c)

Monatomic

d)

Ionic

10.

Which compound will have the least ionic character?

a)

CaCl

b)

KCL

c)

CaBr

d)

NaCl

11.
What explains the very high melting and boiling point of water
a)
Strong dipole-dipole bonds between water molecules
b)
Strong hydrogen bonds between water molecules
c)
Dispersion forces which are present in all molecules
d)
Asymmetrical shape of the polar bonds.
12.
Hydrogen bonding occurs when hydrogen is bonded to N, O, or F.  Which of the following has hydrogen bonding?
a)
CBr4
b)
NO2
c)
H2S
d)
NH3
13.
Which is the second strongest intermolecular force, after hydrogen bonding?
a)
dipole-dipole attraction
b)
London forces
14.

Which substance would have the weakest intermolecular forces of attraction?

a)

CH4

b)

NaCl

c)

H2O

d)

MgF2

15.
What is the species that lose electrons in a redox reaction?
a)
oxidizing agent
b)
reducing agent
c)
is reduced
d)
decreases in oxidation number
16.
What is the reducing agent of this reaction?
2Al(s) + 6H+(aq) −−−> 2Al3+ (aq) + 3H2(g)
a)
H+
b)
Al3+
c)
Al
d)
H2
17.

What is the colour change of acidified KMnO4(aq) solution when serving as oxidizing agent?

a)

From green to orange

b)

From orange to green

c)

From purple to colourless

d)

From colourless to purple

18.

Reduction is the ___________ of electrons.

a)

loss

b)

gain

c)

sharing

d)

transfer

19.

What is the electronic configuration for this atom?

a)

2.7.2

b)

2.8.1

c)

2.8.2

d)

2.8.3

20.

Why does an ionic solid NOT conduct electricity

a)

Because the atoms cant move

b)

Because the ions cant move

c)

Because the electrons cant move

d)

Because electricity cannot travel through any solids

21.

What is reduction?

a)

The loss of oxygen

b)

The gain of oxygen

c)

The loss of electrons

d)

The gain of electrons

22.

What is oxidation?

a)

The gain of oxygen

b)

The loss of oxygen

c)

The loss of electrons

d)

The gain of electrons

23.

What happens in a redox reaction

a)

Only reduction

b)

Only oxidation

c)

Reduction and oxidation

d)

Neither

24.

An element with a melting point above 1000 does not conduct electricity and forms a compound with oxygen that is solid at room temp

a)

silicon

b)

carbon

c)

iron

d)

sulfur

25.

Which of the following would lead to decrease in reaction rate?

a)

decrease particle size

b)

increase pressure

c)

increase enthalpy change

d)

increase activation energy

26.

Which statement is correct

a)

Electronegativity decreases as you go acorss the period as the electrons are further away from nucleus

b)

Atomic radius decreases as you go across period as the nuclear charge is stronger which pulls the electrons in closer

c)

Ionisation energy increases as you go down group as there is a stronger pull on outer electrons

d)

Atomic size increases as you go across the period as the atom gets bigger

27.

Which of the following statements is correct about water and ethane

a)

water has higher boiling point than ethane as the covalent bonds are harder to break

b)

ethane has higher boiling point than water due to LDF being stronger

c)

water has a higher boiling point as hydrogen bonds in water require more energy than the LDF present in ethane

d)

Water has higher boiling point as it has stronger hydrogen bonds than the hydrogen bonds in ethane

28.

What is the strongest type of bond broken when silicon melts

a)

ionic

b)

London Dispersion Forces

c)

Covalent

d)

Permanent dipole- permanent dipole

29.

Which diatomic molecule will have the most covalent character?

a)

Nitrogen

b)

hydrogen chloride

c)

hydrogen bromide

d)

hydrogen fluoride

30.

Which of the following is NOT a covalent molecule that is solid at room temp

a)

carbon (fullerene)

b)

sulfur

c)

phosphorous

d)

Silicon

31.
What makes a valence electron more attracted to the nucleus?
a)
less distance between the nucleus and having less protons
b)
less distance between the nucleus and having more protons
c)
more distance between the nucleus and having less protons
d)
more distance between the nucleus and having more protons
32.
List the following from largest to smallest atomic radius.
P, Cs, Co, Sr
a)
P, Co, Sr, Cs
b)
P, Cs, Co, Sr
c)
Cs, Sr, Co, P
d)
Sr, Cs, Co, P
33.

What happens to atomic radius across a period?

a)

the atoms get bigger because the nucleus is bigger as more protons are added

b)

the atoms get bigger because there are more ve-

c)

the atoms get smaller because with more attraction to the extra protons, the e- cloud moves closer to the nucleus

34.

Which statement is correct

a)

Electronegativity decreases as you go acorss the period as the electrons are further away from nucleus

b)

Atomic radius decreases as you go across period as the nuclear charge is stronger which pulls the electrons in closer

c)

Ionisation energy increases as you go down group as there is a stronger pull on outer electrons

d)

Atomic size increases as you go across the period as the atom gets bigger

35.

Electronegativity __________ from left to right within a period and __________ from top to bottom within a group.

a)

increases, decreases

b)

increases, increases

36.
The minimum energy required to remove an electron from the ground state of an atom
a)
electron configuration
b)
energy levels
c)
ionization energy
d)
ionic bond
37.

Factors affecting the ionisation energy:

a)

Atomic radius

b)

Effective nuclear charge

c)

Shielding effect

d)

All of the above

38.

Hydrogen will form a non-polar covalent bond with an element that has an electronegativity value of

a)

0.9

b)

1.5

c)

2.2

d)

2.5

39.

What are the strongest intramolecular forces?

a)

London Dispersion Forces

b)

Dipole-Dipole interactions

c)

Hydrogen Bonding

40.

What are the forces of attraction holding helium atoms together called?

a)

Hydrogen Bonds

b)

London Dispersion Forces

c)

Covalent Bonds

d)

Metallic Bonds

41.

Definition - The electrostatic attraction between positive nuclei and negatively charged pair of electrons shared between them.

a)

Ionic Bond

b)

Hydrogen Bond

c)

Covalent Bond

d)

Inter-molecular bond

42.

The strength of this force depends on the number of electrons present in the molecule.

a)

Hydrogen Bonding

b)

Metallic Bonding

c)

London Dispersion

d)

Dipole-Dipole

43.

This form of bonding has very high melting points when elemental, and is insoluble.

a)

Ionic Lattice

b)

Covalent Network

c)

Covalent Molecular

d)

Metallic Lattice

44.

Electrostatic attraction between the permanent dipoles of two polar molecules

a)

Permanent Dipole polar interactions

b)

Permanent Dipole - Permanent Dipole interactions

c)

Dipole interactions

d)

Polar Dipole interactions

45.

The name of any force acting between a molecule and neighbouring molecules.

a)

Intra-molecular force

b)

Van der Waals

c)

Dipole-Dipole

d)

Electrostatic bonding.

46.

In the same period, as atomic number increases atomic size

a)

increases

b)

decreases

c)

remains unchained

d)

demonstrates no trend

47.

Ionisation energy is defined as

a)

the energy required to discharge 1 mole of electrons from an element in a gaseous state

b)

the energy required to remove 1 shell of electrons

c)

the energy required to discharge 1/2 a mole of electrons

d)

The elements attraction for bonding electrons in a covalent bond

48.

Sort in order of increasing VDW's forces

a)

PDP-PDP, LDF, Hydrogen Bonding

b)

LDF, PDP-PDP, Hydrogen Bonding

c)

Hydrogen Bonding, LDF, PDP-PDP

d)

Hydrogen Bonding, PDP-PDP, LDF

49.

Which colored box highlights the amino group?

a)

Blue (left)

b)

Turquoise (top)

c)

Orange

d)

Red

e)

Purple

50.
Proteins are composed of what smaller subunits?
a)
amino acids
b)
nucleic acids
c)
fatty acids
d)
nucleotides
51.

Which colored box highlights the carboxyl?

a)

Blue (left)

b)

Turquoise (top)

c)

Orange

d)

Red

e)

Purple

52.

What is a long chain of amino acids called?

a)

Polysaccharide

b)

Lipid

c)

Carbohydrate

d)

Polypeptide

e)

Nucleic acid

53.

What is a long chain of amino acids called?

a)

Polysaccharide

b)

Lipid

c)

Carbohydrate

d)

Polypeptide

e)

Nucleic acid

54.

Enzymes belong to which category of organic molecule?

a)

Proteins

b)

Lipids

c)

Carbohydrates

d)

Nucleic acids

55.

Which statement about enzymes is FALSE?

a)

They are made from amino acids

b)

They can be used multiple times

c)

They lower the energy needed for reactions

d)

A single enzyme has many different functions

56.
The bond that joins amino acids are called:
a)
Peptide Bonds
b)
Ester Bonds
c)
Glycosidic Linkages
d)
Phosphodiester Bonds
57.

If a methyl group (-CH3), which does not like water, were at the 'R', the amino acid would likely be:

a)

Hydrophobic

b)

Hydrophilic

c)

Ionic

d)

Acidic

58.
What happens when enzymes are heated to a high temperature?
a)
The enzymes die.
b)
The shapes of the enzyme are altered or denatured
c)
The enzymes' amino acid sequence changes.
d)
The enzymes remain the same
59.

Which is the strongest intermolecular force?

a)

London Dispersion forces

b)

Permanent Dipole-Permanent Dipole

c)

Hydrogen Bonding

d)

Covalent Bonding

60.

For hydrogen bonding to take place between molecules one of three elements must be covalently bonded to hydrogen. Which three?

a)

Oxygen, Sulfur, Chlorine

b)

Nitrogen, Oxygen, Fluorine

c)

Nitrogen, Helium, Bromine

d)

Oxygen, Fluorine, Chlorine

61.

Which is correct for the bond in Hydrogen Chloride?

a)

A

b)

B

c)

C

d)

D

62.

a)

1

b)

2

c)

3

d)

4

63.

Which of the following compounds could be oxidised to form a carboxylic acid?

a)

Propanone

b)

Butan-2-ol

c)

Ethanal

d)

2 methyl propan-2-ol

64.

Amino acids are the building blocks of the following

a)

Proteins

b)

Esters

c)

Glycerol

d)

Terpenes

65.

Name the following hydrocarbon:

a)

Pentanone

b)

3-methyl propanal

c)

2-methybutanal

d)

1-methylbutanone

66.

Which of the following could be described as a secondary alcohol?

a)

Hexanol

b)

2-methyl propan-2-ol

c)

Butan-2-ol

d)

Propanone

67.

An unknown hydrocarbon reacts with tollens reagent forming a "silver mirror" on the tube used. The hydrocarbon could be

a)

Methanal

b)

Propanone

c)

2-methyl butan-2-ol

d)

3-methyl hexan-2-one

68.

When reacted, which of the following could produce an ester?

a)

Butanol and butanone

b)

Methane and Methanoic Acid

c)

Ethanol and Octanoic Acid

d)

Ethanal and Methanol

69.

When esters are formed which type of reaction takes place?

a)

Hydrolysis

b)

Addition

c)

Dehydration

d)

Condensation

70.

Which of the following represents glycerol?

a)
b)
c)
d)
71.

Vegetable oils (unsaturated hydrocarbons) can be transformed to vegetable fats (saturated hydrocarbons) by the process of

a)

Hydrolysis

b)

Condensation

c)

Hydrogenation

d)

Dehydrogenation

72.

Which of the following is not a step in a free radical chain reaction?

a)

Initiation

b)

Activation

c)

Propagation

d)

Termination

73.
a)

2,2,2-trimethylethanol

b)

2,2-dimethylpropan-1-ol

c)

2,2-dimethylpropan-3-ol

d)

2,2-dimethylpentan-1-ol

74.

Which of the following fats is the most unsaturated?

a)

C15H29COOH

b)

C15H31COOH

c)

C17H31COOH

d)

C17H35COOH

75.

Which of the following is an isomer of pentan-3-ol?

a)

CH3CH2CH(OH)CH2CH3

b)

CH3CHCHCH2CH2OH

c)

CH3CHCHCH(OH)CH3

d)

CH3CH(CH3)CH2CH2OH

76.

Name the alcohol that would be formed when pentyl butanoate is hydrolysed?

a)

Butanol

b)

Propanol

c)

Pentanol

d)

Butanoic Acid

77.

Essential amino acids are defined as the amino acids which?

a)

are necessary for building proteins

b)

humans must acquire through their diet

c)

plants cannot synthesise for themselves

d)

are produced when any protein is hydrolysed

78.

Which species undergoes a gain of electrons?

Zn(s) + Mg2+(aq) −−−> Zn2+(aq) + Mg (s)

a)

Zn

b)

Mg2+

c)

Zn2+

d)

Mg

79.
What is the reducing agent of this reaction?
2Al(s) + 6H+(aq) −−−> 2Al3+ (aq) + 3H2(g)
a)
H+
b)
Al3+
c)
Al
d)
H2

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