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Tenth Grade (Grade 10) Reactions Questions

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Grade 10 Reactions
What type of chemical reaction is [math]P + O -> PO[/math]?
  1. synthesis
  2. decomposition
  3. single replacement
  4. double replacement
Grade 10 Reactions
Grade 10 Reactions
What happens to matter during a chemical reaction?
  1. some matter is destroyed
  2. matter is neither destroyed or created
  3. some matter is created
  4. some matter is destroyed and some is created
Grade 10 Reactions
The burning of methane is an example of a(n)
  1. catabolic reaction
  2. biochemical reaction
  3. anabolic reaction
  4. exothermic reaction
Grade 10 Reactions
Which of the following is true for all chemical reactions?
  1. The total mass of the reactants increases.
  2. The total mass of the products is greater than the total mass of the reactants
  3. The total mass of the reactants equals the total mass of the products.
  4. The total mass of the products is less than the total mass of the reactants.
Grade 10 Reactions
When hydrogen and oxygen combine to form water, water is
  1. a product
  2. a reactant
  3. both a product and reactant
  4. neither a product nor a reactant
Grade 10 Reactions
Which is the balance equation for the following reaction?

[math]KCl + Al rarr AlCl_3 + K[/math]
  1. [math]KCl + Al rarr AlCl_3 + 3K[/math]
  2. [math]3KCl + Al rarr 3AlCl_3 + K[/math]
  3. [math]KCl + Al rarr 3AlCl_3 + 3K[/math]
  4. [math]3KCl + Al rarr AlCl_3 + 3K[/math]
Grade 10 Reactions
What type of reaction is Al + HCl -> H + AlCl
  1. synthesis
  2. decomposition
  3. single replacement
  4. double replacement
Grade 10 Reactions
To balance a chemical equation, you may adjust the
  1. coefficients
  2. subscripts
  3. formulas of the product
  4. either of coefficients or subscripts
Grade 10 Reactions
When water decomposes into hydrogen and oxygen, the mass                                                         .
  1. increases
  2. decreases if the temperature exceeds 100 degrees Celsius
  3. remains constant
  4. decreases its melting point
Grade 10 Reactions
Grade 10 Reactions
Which of the following includes an example of a chemical property of an element?
  1. Aluminum is a solid at room temperature and is a poor thermal insulator.
  2. Sulfur is not shiny and is not malleable.
  3. Sodium is a solid at room temperature and reacts with other elements.
  4. Silicon is shiny and is a poor conductor of electricity.
Grade 10 Reactions
What is the term used to describe the energy needed to get a reaction started?
  1. adhesion energy
  2. activation energy
  3. cohesion energy
  4. chemical energy
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