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Ninth Grade (Grade 9) Reactions Questions

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Grade 9 Reactions
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. [math]3 N_2 + 3 H_2[/math] [math]rarr[/math] [math]2 NH_3[/math]
  2. [math] 4 Al + 6 HCl [/math] [math]rarr[/math] [math] 3 H_2 + 2 AlCl_3 [/math]
  3. [math]2 O_2 + 3 H_2[/math] [math]rarr[/math] [math] 2 H_2O[/math]
  4. [math]2 K + Cl_2[/math] [math]rarr[/math] [math]2 KCl[/math]
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
Grade 9 Reactions
What is the type of the reaction below?

[math]2Fe + O_2 rarr 2FeO[/math]
  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.
Grade 9 Reactions
Identify the reactant(s) in the chemical reaction: [math]CO_2 + H_2O rarr H_2CO_3[/math].
  1. [math]CO_2[/math]
  2. [math]CO_2 and H_2O[/math]
  3. [math]CO_2, H_2O, and H_2CO_3[/math]
  4. [math]H_2CO_3[/math]
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