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Ninth Grade (Grade 9) Reactions Questions

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Grade 9 Reactions
The process by which chemical bonds are broken and formed is called a                        .
  1. chemical reaction
  2. decomposition
  3. displacement
  4. stoichiometric reaction
Grade 9 Reactions
A reaction that forms water and a salt is called a                        .
  1. chemical reaction
  2. basic reaction
  3. neutralization reaction
  4. none of the above
Grade 9 Reactions
In chemical reactions, atoms are                .
  1. created
  2. destroyed
  3. rearranged
  4. neutralized
Grade 9 Reactions
Which cannot take place during a chemical reaction?
  1. Formation of new atoms
  2. Bonds breaking between atoms
  3. Formation of new molecules
  4. Bonds forming between atoms
Grade 9 Reactions
Which of the following is a balanced equation?
  1. 3N2+3H2 → 2NH3
  2. 4Al+6HCl → 3H2+2AlCl3
  3. 2O2+3H2 → 2H2O
  4. 2K+Cl2 → 2KCl
Grade 9 Reactions

This question is a part of a group with common instructions. View group »

The activation energy in a chemical reaction is
  1. the energy needed to slow down a reaction.
  2. the energy needed to change lipids into proteins.
  3. the energy needed to get a reaction started.
  4. the energy needed to stop a reaction.
Grade 9 Reactions
Chemical reaction in which two or more atoms or molecules combine to form larger molecules is called a                       .
  1. decomposition reaction
  2. synthesis reaction
  3. displacement reaction
  4. catabolic reaction
Grade 9 Reactions
What is the type of the reaction below?

2Fe+O2→2FeO
  1. Decomposition
  2. Synthesis
  3. Single displacement
  4. Double displacement
Grade 9 Reactions
What are the elements or compounds formed by chemical reactions?
  1. The products
  2. The reactants
  3. The solids
  4. The gases
Grade 9 Reactions
When a copper penny oxidizes, it forms a new substance called
  1. iron oxide.
  2. copper sulphate.
  3. copper oxide.
  4. aluminium oxide.
  5. copper chloride.
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