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 two characteristics that can help you identify a chemical reaction.
Describe what happens to the properties of substances involved in a chemical reaction.
Describe what is meant by the term 'precipitate' in a chemical reaction.
Explain why a change in energy is considered a characteristic of a chemical reaction.
When a piece of magnesium ribbon is burned in air, a white powder is formed and light is produced. Name two characteristics of chemical reactions shown in this process.
When iron reacts with oxygen to form rust, what new substance is formed?
When silver nitrate is added to sodium chloride solution, a white solid forms. What is this white solid called?
When two clear solutions are mixed and a yellow solid forms, what characteristic of chemical reactions is being observed?
Which of the following is a characteristic of a chemical reaction?
(1) Change in shape
(2) Change in color
(3) Change in size
(4) Change in position
Which of the following is a characteristic of a chemical reaction?
(1) Change in taste
(2) Change in color
(3) Change in size
(4) Change in shape
Which of the following is a chemical change?
(1) Evaporation of water
(2) Souring of milk
(3) Melting of ice cream
(4) Breaking a stick
Which of the following is a sign that a chemical reaction has occurred?
(1) Change in temperature
(2) Change in mass
(3) Change in pressure
(4) Change in volume
A change in color during a reaction is an indication of a ________.
A chemical reaction in which heat is released is called an ________ reaction.
A chemical reaction that absorbs heat from the surroundings is called an ________ reaction.
The formation of a ________ during a chemical reaction is called precipitation.
True or False: A chemical reaction always results in the formation of one or more new substances.
True or False: All chemical reactions are accompanied by a change in color.
True or False: All chemical reactions are visible to the naked eye.
True or False: The change in temperature during a chemical reaction can be either an increase or a decrease.
