WorksheetsChemical Reactions
Total questions: 33
Worksheet time: 18mins
Elements found in sodium hydroxide.
Na, O, H
Na, Cl, O
Elements found in copper sulfide.
Copper, Sulfur
Copper, Hydrogen, Chlorine
Rusting is a chemical change. The metal reacts with oxygen and water.
True
False
H2 + O → H2O
True or False:
In a chemical reaction, no new atoms are created, and no atoms are destroyed.
True
False
NaCl is the (a) in this reaction.
When vinegar and baking soda are combined, bubbles and foam are produced.
What evidence demonstrates that a chemical change has occurred?
A color change occurs.
A gas is formed.
A solid is dissolved.
A precipitate is formed.
What type of reaction is this?
P4 + 3O2 → 2P2O3
Synthesis
Decomposition
Single displacement
Combustion
What type of reaction is this?
iron + sulfuric acid → iron (III) sulfate + hydrogen
Synthesis
Single Replacement
The reaction below is an example of?
silver nitrate + sodium chloride → silver chloride + sodium nitrate
What type of reaction is illustrated below?
hydrogen iodide → hydrogen + iodine
What type of reaction is C3H8 + 5O2 → 3CO2 + 4H2O?
Complete the equation:
magnesium + chlorine → (a)
Complete the equation:
calcium + (a) → calcium oxide
The fluorine atom has an atomic number of
19
9
The atomic mass of Chlorine is
35
35.45
18.45
17
How many protons in Cl?
35
35.45
18.45
17
Symbol for Sodium is
S
Sd
Na
K
The element name of N is
Nitrogen
Nickel
Natrium
Nobel
An experiment released a colourless gas which rekindles a glowing wooden splinter. The gas released is
Carbon dioxide
Hydrogen
Nitrogen
Oxygen
Which of the following statements is correct for the test of carbon dioxide?
it changes limewater from milky to colourless
it changes limewater from colourless to pink
it changes limewater from colourless to milky
Which of the following is the correct test for hydrogen gas?
It relights a glowing wooden splinter
It gives a pop sound with a glowing wooden splinter
It gives a pop sound with a lighted wooden splinter
What is the pH of a neutral solution?
around 1 - 3
around 5 - 7
7
9
A liquid has a pH of 1. What type of liquid is it?
weak acids
strong acids
weak alkaline
strong alkaline
A liquid has a pH of 14. What type of liquid is it?
weak acids
strong acids
weak alkaline
strong alkaline
If red litmus paper turns blue and blue litmus paper stays blue with a given solution it is
acidic
alkaline
neutral
If red litmus paper stays red and blue litmus paper turns red with a given solution it is
acidic
alkaline
neutral
The color of a universal indicator in the presence of a strong alkali is
(a)
The color of a universal indicator in the presence of a strong acid is
(a)
The color of a universal indicator in the presence of a neutral substance is
(a)
