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Chemical reactions

Total questions: 89

Worksheet time: 52mins

Name
Class
Date
1.

The type of chemical reaction where A + B --> AB

a)

decomposition

b)

synthesis

c)

precipitation

d)

combustion

2.

The type of chemical reaction where AB --> A + B

a)

decomposition

b)

synthesis

c)

corrosion

d)

precipitation

3.

The type of chemical reaction where AX + BY --> AY + BX and either AY or BX is a precipitate

a)

precipitation

b)

corrosion

c)

combustion

d)

decomposition

4.

A solution where a solute is dissolved in water

a)

solvent

b)

aqueous

c)

hydrated

d)

cation

5.

An ionic compound dissolves in water to form

a)

positive anions and negative cations

b)

positive cations and negative anions

6.

Magnesium sulphate will dissolve in water to form

a)

positive magnesium ions and negative sulphate ions

b)

positive sulphate ions and negative magnesium ions

c)

positive chloride ions and negative sodium ions

d)

positive sodium ions and negative chloride ions

7.

The name of the solid that forms when two aqueous solutions are mixed

a)

solvent

b)

solute

c)

precipitate

d)

insolible

8.

Name this compound Ca3(PO4)2

a)

calcium sulphate

b)

calcium carbonate

c)

calcium phosphate

d)

calcium ionate

9.

Name this compound Na2CO3

a)

sodium sulphate

b)

sodium nitrate

c)

sodium carbonate

d)

sodium phosphate

10.

Sodium carbonate has how many sodium atoms?

a)

1

b)

2

c)

3

d)

4

11.

How many carbonate ions are in aluminium carbonate: Al2(CO3)3

a)

1

b)

2

c)

3

d)

4

12.

The name for elements circled in the periodic table shown

a)

metals

b)

nonmetals

c)

metalloids

d)

transition metas

13.

The atom found in group 4 period 5

a)

Pb

b)

Fe

c)

Sn

d)

K

14.

The number of protons in W

a)

10

b)

85

c)

124

d)

74

15.

The type of reaction when water is split into hydrogen and oxygen by electricity

a)

synthesis

b)

decomposition

c)

double displacement

d)

precipitation

16.

the type of reaction when sodium and chlorine react to form sodium chloride

a)

synthesis

b)

decomposition

c)

precipitation

d)

corrosion

17.

An ionic compound is made up of

a)

positive cations and negative anions

b)

positive anions and negative cations

18.

All metals want to __________ outer electrons in chemical reactions with nonmetals

a)

donate

b)

accept

19.

All nonmetals want to __________ outer electrons when reacting with metals

a)

donate

b)

accept

20.

The chemical formula for lithium sulphate

a)

Li2SO4

b)

Li4SO4

c)

Li2(SO4)3

d)

Li(SO4)2

21.

The chemical formula for beryllium phosphate

a)

Be2(PO4)3

b)

BePO4

c)

Be3(PO4)2

d)

Be(PO4)3

22.

The chemical formula for magnesium fluoride

a)

MgF

b)

Mg2F

c)

MgF2

d)

Mg2F3

23.

The chemical formula for aluminium oxide

a)

Al3O2

b)

AlO2

c)

AlO

d)

Al2O3

24.

This type of reaction releases more energy than it absorbs

a)

exothermic

b)

endothermic

25.

the chemical formula for aluminium sulphate

a)

Al2SO4

b)

AlSO4

c)

Al2(SO4)3

d)

Al3(SO4)4

26.

The name of Ca3N2

a)

calcium nitrate

b)

calcium nitride

c)

calcium phosphate

d)

calcium sulphate

27.

The name of Ca(NO3)2

a)

calcium nitride

b)

calcium nitrate

c)

calcium phosphate

d)

calcium sulphate

28.

When a metal reacts with an acid, the products are a salt and

a)

carbon dioxide gas

b)

hydrogen gas

c)

oxygen gas

d)

water

29.

The chemical formula for hydrochloric acid

a)

H2Cl

b)

HCl

c)

HCl2

d)

H3Cl2

30.

When an acid reacts with a carbonate the products are salt, water and

a)

hydrogen gas

b)

carbon dioxide gas

c)

oxygen gas

d)

carbon

31.

When an acid reacts with a carbonate it is an example of a

a)

precipitation reaction

b)

neutralisation reaction

c)

combination reaction

d)

synthesis reaction

32.

When an acid reacts with a base, the products are salt and

a)

water

b)

hydrogen gas

c)

carbon dioxide gas

d)

oxygen gas

33.

A salt is made up of

a)

metal and non-metal ions

b)

metal ions

c)

nonmetal ions

d)

hydrogen atoms

34.

Acids dissociate in water to produce

a)

hydrogen ions

b)

hydroxide ions

c)

salts

d)

oxygen

35.

Bases dissociate in water to produce

a)

hydrogen ions

b)

hydroxide ions

c)

salts

d)

hydrogen gas

36.

Acids have a pH

a)

less than 7

b)

greater than 7

c)

equal to 7

37.

Bases have a pH

a)

less than 7

b)

equal to 7

c)

greater than 7

d)

neutral

38.

These types of acids completely dissociate in water

a)

strong

b)

weak

c)

concentrated

d)

dilute

39.

A solution which has a lot of solute dissolved in a small amount of water

a)

dilute

b)

concentrated

c)

strong

d)

weak

40.

A solution in which no more solute will dissolve

a)

soluble

b)

saturated

c)

solvented

d)

dilute

41.

A solution with a small amount of solute dissolved in a large volume of solvent

a)

concentrated

b)

dilute

c)

strong

d)

weak

42.

Hydrochloric acid completely dissociates in water to form H+1 ions and Cl-1 ions, therefore it is a __________ acid

a)

strong

b)

weak

c)

concentrated

d)

dilute

43.

Vingear dissociates partially to form some hydrogen ions, but not all the hydrogen dissociates in solution. Therefore vinegar is a

a)

weak acid

b)

strong acid

c)

dilute acid

d)

concentrated acid

44.

Copper carbonate when heated breaks down to form copper oxide and carbon dioxide. This is an example of a ___________ reaction

a)

synthesis

b)

combination

c)

decomposition

d)

combustion

45.

copper (II) phosphate has the chemical formula

a)

CuPO4

b)

Cu3(PO4)2

c)

Cu2PO4

d)

Cu3(PO4)3

46.

which of these are exothermic?

a)

electrolysis of water

b)

combustion

c)

decomposition of copper carbonate

d)

photosynthesis

47.

Which of these is endothermic?

a)

thermal decomposition of calcium carbonate

b)

combustion

c)

respiration

d)

burning fossil fuels

48.

This type of reaction releases energy

a)

exothermic

b)

endothermic

49.

This type of reaction takes in more energy than it releases

a)

exothermic

b)

endothermic

50.

The thermal decomposition of copper carbonate produces

a)

copper oxide and water

b)

copper oxide and carbon

c)

copper oxide and carbon dioxide

d)

copper oxide

51.

To test for the presence of carbon dioxide gas you should

a)

bubble the gas through limewater

b)

do the pop test

c)

check for a colour change

d)

test for a precipitate being formed

52.

To test for hydrogen gas being produced you should

a)

do the pop test

b)

bubble the gas through limewater

c)

sniff the gas

d)

check for a colour change

53.

When copper carbonate undergoes thermal decomposition, the products are

a)

copper oxide and water

b)

copper oxide

c)

copper oxide and carbon dioxide

d)

copper oxide and hydrogen gas

54.

A solution of sodium chloride contains

a)

positive sodium ions and negative chloride ions

b)

positive chloride ions and negative sodium ions

55.

When an acid reacts with a metal carbonate, the products are

a)

salt, water and carbon dioxide

b)

salt and water

c)

carbon dioxide gas

d)

salt

56.

When an acid reacts with a base, the products are

a)

salt and carbon dioxide

b)

salt and water

c)

salt

d)

carbon dioxide

57.

When aluminium carbonate dissolves in water it produces

a)

positive carbonate ions and negative chloride ions

b)

positive aluminium ions and negative carbonate ions

c)

positive carbonate ions and negative aluminium ions

d)

positive anions and negative cations

58.

The decomposition of zinc (II) carbonate would produce

a)

zinc oxide and water

b)

zinc oxide and oxygen

c)

zinc oxide and carbon dioxide gas

d)

zinc oxide and salt

59.

The decomposition of CaCO3 will produce

a)

CaO + CO2

b)

Ca2O + O2

c)

CaO2 + CO2

d)

Ca + H2O

60.

When a solution of silver (I) nitrate is mixed with a solution of sodium chloride, the products are

a)

AgCl + NaNO3

b)

AgCl + Na2NO3

c)

AgCl + H2O

d)

AgCl + NaN

61.

From the table, which one of the following would be a precipitate in a reaction between barium nitrate and sodium sulphate?

a)

silver chloride

b)

lead sulphate

c)

barium sulphate

d)

calcium sulphate

62.

The atoms in a chemical reaction are

a)

destroyed to form the products

b)

created to form the products

c)

rearranged to form the products

d)

created and destroyed in the process of forming the products

63.

Which of these exists naturally as a diatomic molecule

a)

magnesium

b)

silver

c)

hydrogen

d)

argon

64.

When calcium carbonate reacts with hydrochloric acid, the products are

a)

CaCl2 + H2O +CO2

b)

CaCl2 + CO2

c)

CaCl2 + H2O

d)

CaCl2 + O2

65.

When an acid reacts with a carbonate, the products are

a)

salt + water

b)

salt + water + carbon dioxide gas

c)

salt + carbon dioxide gas

d)

salt + hydrogen gas

66.

Sulfuric acid (hydrogen sulphate) has the chemical formula

a)

HSO4

b)

H2SO4

c)

H4SO4

d)

H3SO4

67.

The other name for sulfuric acid is

a)

monohydrogen sulphate

b)

hydrogen sulphate

c)

dihydrogen sulphate

d)

dihydrogen sulfide

68.

Hydrogen chloride is also called

a)

sulfuric acid

b)

phosphoric acid

c)

nitric acid

d)

hydrochloric acid

69.

Hydrochloric acid has the chemical formula

a)

H2Cl3

b)

HCl2

c)

H2Cl

d)

HCl

70.

Phosphoric acid (trihydrogen phosphate) has the chemical formula

a)

H2(PO4)3

b)

HPO4

c)

H3PO4

d)

H2PO4

71.

Phosphoric acid is also called

a)

dihydrogen phosphate

b)

trihydrogen phosphate

c)

monohydrogen phosphate

d)

trihydrogen phosphide

72.

Nitric acid (hydrogen nitrate) has the chemical formula

a)

H3NO2

b)

HNO3

c)

H2NO3

d)

H3NO2

73.

The corrosion of iron is also called

(a)  

74.

The solid formed when two aqueous solutions mix

(a)  

75.

In a chemical reaction, the atoms are

(a)  

76.

A substance has a pH of 3 therefore it is

(a)  

77.

A soluble base

(a)  

78.

NaOH, KOH, Mg(OH)2 are all

(a)  

79.

For iron to rust you need

a)

water and oxygen

b)

oxygen only

c)

water only

d)

salt and water

80.

Iron + Oxygen + water -->

a)

iron nitrate

b)

iron hydroxide

c)

iron dioxide

d)

iron sulphate

81.

These speed up a chemical reaction without being used up

(a)  

82.

When you crush a reactant to powder, this increases the

(a)  

83.

Increasing the surface area increases the

(a)  

84.

Increasing the temperature

a)

increases the reaction rate

b)

decreases the rate of reaction

c)

changes the products

d)

changes the reatants

85.

Increasing the temperature causes more (a)   between reactant molecules

86.

Increasing the pressure causes more (a)   between the reactant molecules

87.

Acid + Base -->

(a)  

88.

Acid + Metal-->

(a)  

89.

copper carbonate when heated breaks down to form (a)   + carbon dioxide

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