18 Questions
What is the primary characteristic of an exothermic reaction?
Energy is released in the form of heat
What is the term for the formation of an insoluble substance in a chemical reaction?
Precipitate
Which type of reaction involves the release of heat energy?
Exothermic reaction
What is the term for a reaction in which energy is absorbed from the surroundings?
Endothermic reaction
What is the result of a chemical reaction in which a solid product is formed from gaseous or liquid reactants?
Change of state
What type of reaction is characterized by the formation of a solid product from two soluble salts in aqueous solution?
Precipitation reaction
What is the primary criterion for a chemical reaction to occur?
Rearrangement of structure of the substance
What type of reaction involves the conversion of one state of matter to another?
Chemical change of state
Which of the following is an example of a chemical reaction with a change in colour?
Iron rusting
What is the term for the formation of an insoluble solid from a liquid solution?
Precipitation
What is the result of a chemical reaction when zinc reacts with sulphuric acid?
Evolution of hydrogen gas
What is the term for the process of conversion of one state of matter to another?
Change of state
What is the primary characteristic that distinguishes a chemical change from a physical change?
One or more new substances with new physical and chemical properties are formed
Which of the following is NOT a characteristic of a chemical reaction?
The change in the identity of the substance remains the same
What is the term for a reaction that involves the formation of a solid from a solution?
Formation of a precipitate
Which of the following is an example of an exothermic reaction?
A reaction that releases heat and light
What is the term for a reaction that involves the breaking or making of bonds between different atoms?
Chemical reaction
Which of the following is a characteristic of a physical change?
The change in color or state occurs
Test your understanding of chemical reactions that involve changes of state, including reactions with gaseous, liquid, and solid reactants and products. Examples include combustion reactions and precipitation reactions.
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