Which of these are an example of a chemical reaction?
S2 - Chemistry Block 1 Revision

Quiz
•
Chemistry
•
6th - 9th Grade
•
Medium
L Coull
Used 22+ times
FREE Resource
23 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Making some toast
Boiling water
Melting iron
Making a cup of tea with sugar
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chemical reactions are ___________?
Irreversible
Reversible
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What sign of a chemical reaction will be seen in this experiment?
A gas will be made
A precipitate will be made
Heat will be released
It will be endothermic
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which of these is a sign of a chemical reaction?
Iron wool becomes lighter when burned
Two liquids mixed together make a precipitate
Zinc metal is melted to form electronics solder
Salt is added to water
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A precipitate being made is a sign of a chemical reaction, what is it?
A insoluble solid formed when two liquids are mixed together
When a clear liquid becomes coloured
When a gas is made
When a reaction is endothermic
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
What signs of a chemical reaction are there when a sparkler is used?
Heat
Light
Gas made
Precipitate made
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An exothermic reaction is one where heat is?
Heat released
Heat taken in
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