WorksheetsChemical Reactions Test
Total questions: 10
Worksheet time: 9mins
In a chemical change, the reactants and products are _____
Same
Different
Sometimes same
Sometimes different
A student made to poster to show the signs of a chemical change. Which evidence is missing?
Based on the table above, In which country will rusting happen the slowest?
Nigeria
Vietnam
Poland
Iceland
Flame test is a procedure used in chemistry to detect the presence of certain elements, primarily metal ions. Alibi runs a flame test on a white powder. The flame is green in color. which metal is present in the powder?
Lithium
Copper
Barium
Sodium
Which compound is the salt in this equation?
hydrochloric acid
sodium hydroxide
sodium chloride
water
(a) + hydrochloric acid → zinc chloride + hydrogen
When an acid reacts with metal, a salt and hydrogen are produced:
acid + metal → salt + hydrogen.
An example is:
nitric acid + calcium → calcium nitrate + hydrogen
What are the products for the following:
Iron + Sulfuric acid → _____ + _____
(use the plus sign between the two answers)
(a)
When an acid reacts with a metal carbonate, a salt, water and carbon dioxide are produced:
acid + metal carbonate → salt + water + carbon dioxide
An example:
sulfuric acid + zinc carbonate → zinc sulfate + water + carbon dioxide
Write the reaction for Iron carbonate and nitric acid.
See if you can complete the following word equations (Hint – look for the pattern).
eg. magnesium + iron chloride → magnesium chloride + iron
iron + copper nitrate → ____________ + _________
Write down two reasons to support that burning (also called combustion) is a chemical change.
