Characteristics of Chemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Characteristics of Chemical Reactions starts at 7 and continues till grade 12.
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Describe one way to tell if a chemical reaction has taken place.
Describe what happens to the properties of substances during a chemical reaction.
Describe what is meant by the term 'precipitate' in a chemical reaction.
Explain why burning wood is considered a chemical reaction.
A white solid forms when two clear solutions are mixed. This solid is called a ______.
The appearance of a ______ during a reaction is a sign of a chemical change, such as when silver nitrate reacts with sodium chloride.
When iron reacts with oxygen and water, it forms rust. What is the new substance formed called?
When magnesium ribbon burns in air, it forms a white powder. What does this indicate?
Which of the following is a characteristic of a chemical reaction?
(1) Change in state only
(2) Formation of a new substance
(3) Change in size only
(4) No change at all
Which of the following is a chemical reaction?
(1) Freezing water
(2) Burning a candle
(3) Cutting paper
(4) Melting ice cream
Which of the following is a sign of a chemical reaction?
(1) Change in taste
(2) Change in size
(3) Change in shape
(4) Change in position
Which of the following is a sign that a chemical reaction has occurred?
(1) Melting of ice
(2) Rusting of iron
(3) Breaking a glass
(4) Dissolving sugar in water
A chemical reaction always results in the formation of one or more ______ substances.
A chemical reaction that absorbs heat from the surroundings is called an ______ reaction.
A chemical reaction that releases heat is called an ______ reaction.
A white solid forms when two clear solutions are mixed. This solid is called a ______.
Is the burning of a candle a chemical reaction?
Is the change in color always a reliable indicator of a chemical reaction?
Is the change of water into steam a chemical reaction?
Is the dissolving of salt in water a chemical reaction?
