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Ninth Grade (Grade 9) Acids and Bases Questions

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Grade 9 Acids and Bases
The terms weak and strong are used to classify acids and bases. What do these terms refer to?
  1. how much water is in the solution
  2. the ease with which an acid or base dissolves in solution
Grade 9 Acids and Bases
Which of the following sets of acids form the primary component of acid rain?
  1. Carbonic acid, Sulfuric acid, Nitric acid
  2. Sulfuric acid, Phosphoric acid, Boric acid
  3. Carbonic acid, Hydrochloric acid, Acetic acid
  4. Nitric acid, Perchloric acid, Hydrofluoric acid
Grade 9 Acids and Bases
What can you say about pH of salt solutions?
  1. The pH of salt solutions is perfectly basic with pH < 7.
  2. The pH of salt solutions is not perfectly neutral with pH = 7.
  3. The pH of salt solutions is strongly alkaline with pH > 7.
  4. The pH of most salt solutions is strongly acidic with pH < 7.
Grade 9 Acids and Bases
A strong base
  1. dissociates completely in solution.
  2. does not dissociate completely.
Grade 9 Acids and Bases
When a base is dissolved in water, what is released?
  1. H+
  2. OH-
  3. CO2
Grade 9 Acids and Bases
What is the pH of pure water?
  1. pH=0
  2. pH=14
  3. pH=7
Grade 9 Acids and Bases
Which of the following non-metal oxides react with each other during acid rain?
  1. SO2,PO4,Al2O3
  2. SO2,NO2,CO2
  3. SO2,SiO2,CO2
  4. SO2,NO2,PO4
Grade 9 Acids and Bases
Which of the following compounds is an example of Lewis base?
  1. BF3
  2. AlCl3
  3. SiF4
  4. C6H5N
Grade 9 Acids and Bases
What is the pH of pure water?
  1. pH=0
  2. pH=14
  3. pH=7
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