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grade 10 ig first revision

Total questions: 100

Worksheet time: 47mins

Name
Class
Date
1.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
2.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
3.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
4.
How many electrons does Si contain? (click to see image)
a)
14
b)
28
c)
2
d)
4
5.
Nitrogen will form which of the following ions?
a)
N
b)
N-3
c)
N-5
d)
N+5
6.

A substance that dissolves in a liquid is called the...

a)

Solvent

b)

Solute

c)

Solution

d)

Salient

7.

Which of these statements about the halogens is incorrect?

a)

They are reactive because they easily gain one electron

b)

They form ions with a charge of +1

c)

They include fluorine, chlorine, bromine and iodine

d)

They get less reactive as their atomic number increases

8.

What is the correct formula of silver nitrate?

a)

AgNO3

b)

AgNO2

c)

Ag(NO3)2

d)

Ag2NO3

9.

What is the correct formula of magnesium sulphate?

a)

Mg(SO4)3

b)

MgSO4

c)

MnSO4

d)

Mg(SO4)2

10.

What is the correct formula of calcium hydroxide?

a)

Ca(OH)3

b)

Ca(OH)2

c)

CaOH

d)

Ca2OH

11.

Which of these equations is correctly balanced?

a)

Mg + O2 → 2MgO

b)

2Mg + O2 → MgO

c)

2Mg + O2 → 2MgO

d)

Mg + O2 → MgO

12.

Which of the following terms describes the structure of common salt, quicklime, and copper sulphate?

a)

simple covalent

b)

giant covalent

c)

giant ionic

d)

metallic

13.

Which of the following terms describes the structure of iodine, oxygen, and carbon dioxide?

a)

simple covalent

b)

giant covalent

c)

giant ionic

d)

metallic

14.

Name this molecule.

a)

Methane

b)

Ethane

c)

Propane

d)

Butane

15.

Damp red litmus paper turning blue is a positive test for which gas?

a)

hydrogen

b)

oxygen

c)

carbon dioxide

d)

ammonia

e)

chlorine

16.

Damp red litmus paper turning blue, then bleaching white, is a positive test for which gas?

a)

hydrogen

b)

oxygen

c)

carbon dioxide

d)

ammonia

e)

chlorine

17.
The picture below is an example of _________________.
a)
osmosis
b)
isotonic
c)
diffusion
d)
active transport
18.
What is the electron configuration of sodium?
a)
2.8
b)
2.8.2
c)
2.8.1
d)
11
19.
How many electrons does chlorine need to gain in order to have a full outer shell? 
a)
7
b)
0
c)
1
d)
8
20.
Molecules are closest together in a 
a)
Solid
b)
Liquid
c)
Gas
21.

What is diffusion?

a)

when molecules move

b)

when molecules move from a high concentration to a low concentration

c)

no movement

d)

molecules move everywhere

22.
The horizontal row on the periodic table is called a
a)
group
b)
family
c)
period
d)
atomic number
23.
A vertical column is called...
a)
group
b)
tower
c)
period
d)
crew
24.
Most of the mass in an atom is concentrated in the...
a)
electrons
b)
nucleus
c)
protons
d)
empty space
25.
What does the nucleus consist of?
a)
Protons + Electrons
b)
Neutrons + Electrons
c)
Atoms
d)
Protons + Neutrons
26.

Isotopes are the atoms of the same element with the same number of.............. but different number of............

a)

electrons/neutrons

b)

neutrons/protons

c)

protons/neutrons

d)

electrons/protons

27.

Elements contain only one type of atoms.

a)

True

b)

False

28.
What is a pure substance made of two or more elements that are chemically combined called?
a)
A. element
b)
B. compound     
c)
C. mixture
d)
D. solution
29.
silver spoon
a)
A. MIXTURE
b)
B. COMPOUND
c)
C. ELEMENT
30.
A pure substance...
a)
is an element or a compound
b)
is an element or a mixture
c)
is a compound or a mixture
d)
is a mixture
31.
NaHCO3 is an example of —
a)
an abbreviation
b)
a compound
c)
a mixture
d)
an element
32.

How can you get salt from salty water?

a)

evaporate the water; then crystallisation

b)

condense the water; then crystallisation

c)

Filtration

33.

What separation method could you use to separate water from ink?

a)

filtration

b)

distillation

c)

electrolysis

34.

Mixtures can be separated using chromatography.

a)

True

b)

False

35.

Ink can be separated by a method of -----------------------------------------------

a)

distillation

b)

filtration

c)

chromatography

d)

sedimentation

36.
Which element has an electron configuration of 2.5?
a)
Oxygen
b)
Nitrogen
c)
Phosphorus
d)
Carbon
37.
Which element has the electron configuration of 2.7?
a)
Krypton
b)
Iodine
c)
Flourine
d)
Barium
38.
When an atom loses an electron, it becomes a:
a)
positive ion
b)
negative ion
c)
neutral ion
d)
neutral atom
39.

Nitrogen will ____ electrons to become stable.

a)

gain 1

b)

lose 1

c)

gain 3

d)

lose 3

40.
Is Hydrogen considered a metal or a non-metal?
a)
Metal
b)
Non-metal
41.
How are covalent bonds explained?
a)
When one atom takes the other atom's electron
b)
When the atom shares an electron with an another atom
c)
When the two nucleus merge
d)
When the neutrons leave the nucleus
42.
What region of the periodic table contains atoms that form covalent bonds?
a)
the left side
b)
the middle
c)
the right side
d)
top left
43.

What is the mass number of magnesium?

a)

2

b)

4

c)

12

d)

24

44.
What is the relative formula mass of NaOH?
a)
20
b)
39
c)
40
d)
45
45.

What happens to the reactivity of the alkali metals as you move down the group?

a)

increases

b)

decreases

46.

Which of the "Halogens" has yellowish green color?

a)

Chlorine

b)

Bromine

c)

Flourine

d)

Iodine

47.

The laboratory test for oxygen is that

a)

it relights a glowing splint

b)

it relights a burning splint

c)

it changes lime water to milky

d)

it makes a glowing splint go out

48.

Has a mass of 1/2000th the mass of a proton.

a)

electron

b)

neutron

c)

nucleus

d)

electron cloud

49.

What are valence electrons?

a)

electrons on the first orbital always

b)

nucleus

c)

the outermost shell

d)

electrons on the outermost orbital

50.
The particles of the atom you can find by knowing the atomic number.
a)
neutrons
b)
protons and electrons
c)
protons and neutrons
d)
atomic mass
51.
The subatomic particle that determines the identity of an element.
a)
neutron
b)
proton
c)
electron
d)
outer shell
52.
What charge does the nucleus have and why?
a)
positive - the neutrons do not have a charge
b)
positive - the neutrons and protons are positively charged particles
c)
neutral - the neutral charge dominates the positive charge
d)
neutral - electrons cancel out the positive charge of the atom
53.

What is the atomic number of this atom?

a)

1

b)

3

c)

4

d)

7

54.

What is the mass number of this atom?

a)

1

b)

3

c)

4

d)

7

55.

How many electrons does it have?

a)

197

b)

79

c)

118

d)

none of the above

56.

What do these isotopes of carbon all have in common?

a)

neutrons & mass number

b)

atomic number and neutrons

c)

atomic number

d)

protons, atomic number, and mass number

57.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
58.

The following is a:

a)

Compound

b)

Element

c)

Mixture of elements

d)

Mixture of compounds

59.
This picture represents which of the following?
a)
Element
b)
Compound
c)
Mixture
60.

Milk contains water, fat, salt and protein.


Milk is an example of ....

a)

an element

b)

a mixture

c)

a compound

61.

What happens to the mass of a liquid into which a soluble solute is added?

a)

The mass decreases

b)

The mass stays the same

c)

The mass increases

d)

It is impossible to tell

62.

Which of these phrases describes the particles in a solid?

a)

The particles are not in a regular arrangement and can move past each other.

b)

The particles are in a regular arrangement and can move past each other.

c)

The particles are far apart and can move randomly.

d)

The particles are in a regular arrangement and can only vibrate around fixed positions.

63.

If you were using filtration, what would you be trying to separate?

a)

A soluble solid from a liquid

b)

A mixture of two solids

c)

An insoluble solid from a liquid

d)

A mixture of two or more liquids

64.

If you were using simple evaporation, what would you be trying to separate?

a)

A soluble solid from a liquid

b)

A mixture of two solids

c)

An insoluble solid from a liquid

d)

A mixture of two or more liquids

65.

If you were using distillation, what would you be trying to separate?

a)

A soluble solid from a liquid

b)

A mixture of two solids

c)

An insoluble solid from a liquid

d)

A mixture of two or more liquids

66.

If you were using chromatography, what would you be trying to separate?

a)

A soluble solid from a liquid

b)

A mixture of two solids

c)

An insoluble solid from a liquid

d)

A mixture of two or more liquids

67.

Which of these statements is true?

a)

A neutron has a mass 1/1840 of a proton

b)

An electron has the same charge as a proton

c)

In any atom, the number of electrons is equal to the number of neutrons

d)

All atoms of a particular element have the same number of protons

68.

What is the electron configuration of the ion that this atom would form?

a)

2,8,2

b)

2,8,1

c)

2,8

d)

2,8,8

69.

75% of naturally occurring chlorine is Cl-35. The remaining chlorine is Cl-37. Which of the below equations shows how to calculate the relative atomic mass of chlorine?

a)

(75x37) + (25x35) / 100 = 35.5

b)

(75x35) + (25x37) / 100 = 35.5

c)

(75x37) + (25x35) / 100 = 35

d)

(75x35) + (25x37) / 100 = 37

70.

Which of these statements about Group 1 metals is incorrect?

a)

They are very reactive because they lose their inner shell electrons

b)

They form ions with a charge of +1

c)

They are very reactive because they lose their outer shell electron

d)

They react with water to form an alkaline solution

71.

Why are the noble gases so unreactive?

a)

They made a group decision not to react

b)

They have a large number of electrons

c)

They don't like to give up electrons

d)

They have a full outer shell of electrons

72.

Which of these statements about the halogens is incorrect?

a)

They are reactive because they easily gain one electron

b)

They form ions with a charge of +1

c)

They include fluorine, chlorine, bromine and iodine

d)

They get less reactive as their atomic number increases

73.

Which of the following substances conduct electricity when solid? (Could be more than one)

a)

diamond

b)

potassium chloride

c)

copper

d)

carbon disulfide

74.

Which of the following substances conduct electricity when liquid? (Could be more than one)

a)

diamond

b)

potassium chloride

c)

copper

d)

carbon disulfide

75.

Which of the following terms describes the structure of sand, graphite and diamond?

a)

simple covalent

b)

giant covalent

c)

giant ionic

d)

metallic

76.

Which of the following terms describes the structure of sodium, steel, and iron?

a)

simple covalent

b)

giant covalent

c)

giant ionic

d)

metallic

77.

Graphite is soft because... (tick all statements that help explain it)

a)

the carbon atoms are linked by very strong covalent bonds

b)

the forces between the layers are weak

c)

the covalent bonds require a lot of energy to be broken

d)

the atoms are arranged in layers that can slide over each other

78.

Graphite has a high melting point because... (tick all statements that help explain it)

a)

the carbon atoms are linked by very strong covalent bonds

b)

the forces between the layers are weak

c)

the covalent bonds require a lot of energy to be broken

d)

the atoms are arranged in layers that can slide over each other

79.

Graphite can conduct electricity because... (tick all statements that help explain it)

a)

the carbon atoms are linked by very strong covalent bonds

b)

the electrons can move along the layers from one atom to the next

c)

the covalent bonds require a lot of energy to be broken

d)

the atoms are arranged in layers that can slide over each other

80.

Which of these are properties of metals? (Tick all that apply)

a)

High densities

b)

High melting and boiling points

c)

Good conductors of heat and electricity

d)

Malleable

81.

In an endothermic reaction, heat is ,,,

a)

given out

b)

taken in

82.

Acid + Carbonate ----->

a)

salt + hydrogen

b)

salt + water + carbon dioxide

c)

salt + water

d)

salt + carbon dioxide

83.
Zinc + nitric acid --> ?
a)
zinc sulfate + water
b)
zinc sulfate + hydrogen
c)
zinc nitrate + hydrogen
d)
zinc chloride + water
84.
Salts produced by the reactions of hydrochloric acid are known as... 
a)
chlorines
b)
nitrates
c)
chlorides
d)
bromides
85.
Interpret the following equation in terms of moles:
Li3N + 3NH4NO3 --> 3LiNO3 + (NH4)3N
a)
lithium nitride reacts with ammonium nitrate
b)
3 moles of lithium nitrate and 3 moles of ammonium nitrate are produced
c)
3 moles of ammonium nitrate produces 1 mole ammonium nitride
d)
1 mole lithium nitride produces 3 moles ammonium nitrate
86.
Which of the following represent a mole ratio between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO3 + Cu --> Cu(NO3)2 + 2Ag
a)
2 mol AgNO3 / 2 mol Ag
b)
2 mol Ag / 2 mol AgNO3 
c)
2 mol AgNO3 / 2 mol Cu(NO3)2
d)
2 mol AgNO3 / 1 mol Cu(NO3)2
87.
How many hydrogen atoms are in one molecule of Amonium Sulfite (NH4)2SO3?
a)
6.02 x 1023
b)
2
c)
4
d)
8
88.
How many moles are in 6 x 1023 molecules of H2O?
a)
1
b)
2
c)
6
d)
600
89.
Which of the following would have more mass?
a)
1 mole of Li
b)
1 mole of Au
c)
1 mole of Si
d)
None, all are equal
90.
How many molecules are there in 31.8 moles of water?
a)
5.28 x 10-23 molecules
b)
1.91 x 1025 molecules
c)
5.28x 10-25
d)
1.91 x 1022
91.

The number 6.022 x 1023 is called what?

a)

Avocado's Number

b)

Avogadro's Number

c)

Alejandro's Number

d)

Bohr's Number

92.

Which has more molecules?

a)

1 mole H2O

b)

1 mole NaCl

c)

1 mole Al(OH)3

d)

These are all the same

93.

What are the units for molar mass?

a)

g

b)

g/mole

c)

amu

d)

atoms

94.
Which compound has the smallest molar mass?
a)
CO
b)
CO2
c)
H2O
d)
H2O2
95.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
96.
How many moles of carbon atoms are there in 5g of carbon?
a)
60 mol
b)
17 mol
c)
0.42 mol
d)
7 mol
97.
Under certain conditions, cyclohexane can react to form benzene and hydrogen according to the equation:
C6H12(g) → C6H6(g) + 3H2(g); ΔH=+206 kJ mol-1
Which two changes could be used to increase the rate of reaction?
a)
Add a catalyst and reduce the temperature
b)
Add a catalyst and decrease the pressure
c)
Increase the temperature and the external pressure
d)
Add a catalyst and decrease the concentration of cyclohexane
98.
Catalysts are thought to increase the rate of a chemical reaction by
a)
supplying the energy needed to overcome the activation energy
b)
increasing the temperature of the reaction
c)
providing less surface area for the reaction
d)
providing an alternative reaction pathway with a lower activation energy
99.
The main reason for the use of catalysts in most industrial processes is to
a)
reduce greenhouse gas emissions
b)
reduce the energy requirement for a reaction
c)
reduce waste production
d)
increase the yield of product
100.
Increasing the temperature of a chemical reaction
a)
lowers the activation energy of the reaction
b)
increases the energy of the reactant particles only
c)
increases the value of ΔH for the reaction
d)
increases the energy of the reactant and product particles

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