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Topic 5: Chemical formulas and Chemical Equations
17. Chemical equations: Recalling concept facts and definitions
1. The starting substances in chemical reactions are called 3) Reactants
1) Products
2) Coefficients 4) Activated complex
2. In a chemical reaction, the stable substances that are formed at the end of the reaction are called
1) Products 3) Reactants
2) Coefficients 4) Activated complex
3. What is conserve during chemical reactions?
1) Energy, only 3) Both matter and energy
2) Matter, only 4) Neither matter nor energy
4. If equation is balanced properly, both sides of the equation must have the same number of
Teacher Preview Copy
1) Atoms 3) Molecules
4) Moles of molecules
2) Coefficients
5. Given a balanced chemical equation, it is always possible to determine
1) Whether a reaction will or will not take place
2) The conditions necessary for the reaction to take place
3) The relative number of moles taking place in the reaction
4) The physical state of the products and reactants
6. The coefficients in front of the substances in a balanced chemical equations always indicate
3) The mass of the substances
1) The amount of energy released or absorbed
2) The number of moles of substance 4) The number of electrons
7. Given the balanced equation representing a reaction:
Teacher Preview Copy
H+ (aq) + OH- (aq) ------- H2O (l) + 55.8 KJ
In this reaction there is conservation of
1) Mass, only 3) Mass and charge, only
2) Mass and energy, only 4) Mass, charge, and energy
18. Types of chemical reaction reactions: Recalling concept facts and definitions
1. Which is a type of chemical reaction?
1) Fission 2) Fusion 3) Crystallization 4) Synthesis
2. Which process is a type of chemical reaction? 3) Melting 4) Alpha decay
1) Dissolving
2) Combustion
3. Which list is composed only of types of chemical reactions?
1) Synthesis, decomposition, single replacement
3) Synthesis, decomposition, freezing
2) Decomposition, evaporation, and double 4) Decomposition, melting, combustion
4. In which type of chemical reactions would two separate atoms of iodine joined to form a molecule
of iodine? 3) Single replacement
1) Decomposition
2) Synthesis 4) Double replacement
5. In which type of chemical reaction would a molecule of hydrogen peroxide separates into water
and oxygen? 3) Decomposition
1) Combustion
2) Synthesis 4) Single replacement
6. Which type of reaction always involves ions exchange?
1) Decomposition 3) Single replacement
2) Synthesis
4) Double replacement
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 217
Topic 5: Chemical formulas and Chemical Equations
17. Chemical equations: Recalling concept facts and definitions
1. The starting substances in chemical reactions are called 3) Reactants
1) Products
2) Coefficients 4) Activated complex
2. In a chemical reaction, the stable substances that are formed at the end of the reaction are called
1) Products 3) Reactants
2) Coefficients 4) Activated complex
3. What is conserve during chemical reactions?
1) Energy, only 3) Both matter and energy
2) Matter, only 4) Neither matter nor energy
4. If equation is balanced properly, both sides of the equation must have the same number of
Teacher Preview Copy
1) Atoms 3) Molecules
4) Moles of molecules
2) Coefficients
5. Given a balanced chemical equation, it is always possible to determine
1) Whether a reaction will or will not take place
2) The conditions necessary for the reaction to take place
3) The relative number of moles taking place in the reaction
4) The physical state of the products and reactants
6. The coefficients in front of the substances in a balanced chemical equations always indicate
3) The mass of the substances
1) The amount of energy released or absorbed
2) The number of moles of substance 4) The number of electrons
7. Given the balanced equation representing a reaction:
Teacher Preview Copy
H+ (aq) + OH- (aq) ------- H2O (l) + 55.8 KJ
In this reaction there is conservation of
1) Mass, only 3) Mass and charge, only
2) Mass and energy, only 4) Mass, charge, and energy
18. Types of chemical reaction reactions: Recalling concept facts and definitions
1. Which is a type of chemical reaction?
1) Fission 2) Fusion 3) Crystallization 4) Synthesis
2. Which process is a type of chemical reaction? 3) Melting 4) Alpha decay
1) Dissolving
2) Combustion
3. Which list is composed only of types of chemical reactions?
1) Synthesis, decomposition, single replacement
3) Synthesis, decomposition, freezing
2) Decomposition, evaporation, and double 4) Decomposition, melting, combustion
4. In which type of chemical reactions would two separate atoms of iodine joined to form a molecule
of iodine? 3) Single replacement
1) Decomposition
2) Synthesis 4) Double replacement
5. In which type of chemical reaction would a molecule of hydrogen peroxide separates into water
and oxygen? 3) Decomposition
1) Combustion
2) Synthesis 4) Single replacement
6. Which type of reaction always involves ions exchange?
1) Decomposition 3) Single replacement
2) Synthesis
4) Double replacement
Copyright©2010 E3 Scholastic Publishing. All Rights Reserved. SurvivingChem.com 217
