Timedora
Free Practice Quiz Question List

6 Acids and Bases Online Quiz Questions

Use this free practice quiz with 20 questions to review 6 Acids and Bases, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

In a reaction, substance X transfers a proton, H+\mathrm{H^+}, to substance Y. According to the Brønsted–Lowry model, how should X and Y be classified?

  1. A

    X is the acid, and Y is the base.

  2. B

    X is the base, and Y is the acid.

  3. C

    Both X and Y are acids.

  4. D

    Neither X nor Y acts as an acid or a base.

02
Choose one
1 point

You need the most precise pH measurement of an aqueous solution. Which tool should you use?

  1. A

    Use blue litmus paper, because it gives an exact pH reading.

  2. B

    Use a pH meter, because it measures pH more precisely.

  3. C

    Use red litmus paper, because it gives a full range of pH values.

  4. D

    Use phenolphthalein, because it measures pH more precisely than a meter.

03
Choose one
1 point

Which solution is an example of a base in everyday use?

  1. A

    Lemon juice

  2. B

    Vinegar

  3. C

    Baking-soda solution

  4. D

    All three are basic.

04
Choose all
1 point

Select all statements about acid–base indicators that are accurate.

  1. A

    Blue litmus turns red in acid.

  2. B

    Red litmus turns blue in base.

  3. C

    Phenolphthalein is colorless in acidic solutions and pink in sufficiently basic ones.

  4. D

    An indicator gives a more precise pH measurement than a pH meter.

05
Choose all
1 point

Select all equations that correctly represent acid–base neutralization reactions described in the material.

  1. A

    H++OH−→H2O\mathrm{H^+ + OH^- \rightarrow H_2O}

  2. B

    HCl+NaOH→NaCl+H2O\mathrm{HCl + NaOH \rightarrow NaCl + H_2O}

  3. C

    H++OH−→H2\mathrm{H^+ + OH^- \rightarrow H_2}

  4. D

    HCl+NaOH→HCl+NaOH\mathrm{HCl + NaOH \rightarrow HCl + NaOH}

06
True or false
1 point

Lemon juice is an example of an acidic solution. True or false?

  1. A

    True

  2. B

    False

07
True or false
1 point

Under typical conditions, equal reacting amounts of a strong acid and a strong base produce a neutral solution. True or false?

  1. A

    True

  2. B

    False

08
Written response
1 point

A solution at pH 3 has how many times the hydrogen-ion concentration of a solution at pH 4? Enter the factor as a number.

09
Written response
1 point

What term describes how much of a substance is present in a given volume?

10
Written response
1 point

In water, acids increase the amount of which ions?

11
Fill in the blank
1 point

An acid–base indicator changes color over a particular .

12
Fill in the blank
1 point

At room temperature, a solution with pH 5 is .

13
Open ended
1 point

Explain how an acid–base indicator and a pH meter provide different kinds of information about a solution, and identify which is more suitable when a precise pH value is needed.

14
Choose one
1 point

A household product label does not say that mixing the product with vinegar is safe. Should you mix them?

  1. A

    Yes; familiar household chemicals are safe to combine.

  2. B

    No; do not mix them unless the product labels specifically say it is safe.

  3. C

    Yes, as long as the mixture is used in a well-ventilated room.

  4. D

    No; household chemicals should never be used separately.

15
Choose one
1 point

Which statement correctly classifies the solution with pH=9\mathrm{pH}=9?

  1. A

    A solution with pH 4 is basic.

  2. B

    A solution with pH 9 is basic.

  3. C

    A solution with pH 7 is acidic.

  4. D

    A solution with pH 6 is neutral.

16
Choose one
1 point

A student dips blue litmus paper into an acidic solution. What color change should the student expect?

  1. A

    It stays blue.

  2. B

    It turns green.

  3. C

    It turns red.

  4. D

    It turns pink.

17
Written response
1 point

Compare solutions at pH=2\mathrm{pH}=2 and pH=5\mathrm{pH}=5. How many times greater is the hydrogen-ion concentration at pH 2?

18
Choose one
1 point

What happens to blue litmus paper when it is placed in an acidic solution?

  1. A

    It turns red.

  2. B

    It turns blue.

  3. C

    It turns pink.

  4. D

    It becomes colorless.

19
Choose one
1 point

Sample A contains a small amount of an acid that ionizes extensively in water. Sample B contains more acid per unit volume, but its acid ionizes less extensively. Which comparison is correct?

  1. A

    Sample A is more concentrated because it ionizes more extensively; sample B is stronger because it contains more solute per volume.

  2. B

    Sample A and sample B must have equal strength and concentration because both are acids.

  3. C

    Sample B is stronger and more concentrated because it contains more solute per volume.

  4. D

    Sample A is stronger, while sample B is more concentrated.

20
True or false
1 point

True or false: Whenever an acid and a base react, the resulting mixture has pH=7\mathrm{pH}=7.

  1. A

    True

  2. B

    False