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Acids, bases and salts

Class 10 · Chemistry · 6 questions

Name: ____________________   Date: ____________

  1. The pH of a neutral solution at 25 degrees C is:

    • A 7
    • B 1
    • C 0
    • D 14
  2. Which of these is a strong acid?

    • A Hydrochloric acid
    • B Acetic acid
    • C Carbonic acid
    • D Citric acid
  3. Litmus turns red in:

    • A Neutral solutions
    • B Bases
    • C Acids
    • D Salt solutions of strong bases
  4. Acid + base gives:

    • A Metal and acid
    • B Only water
    • C Salt and water
    • D Salt and hydrogen
  5. A solution has a pH of 3. It is:

    • A Acidic
    • B Basic
    • C Neutral
    • D A salt
  6. A solution has [H+] = 1 x 10^-4 mol/dm3. What is its pH?

    • A 10
    • B 1
    • C 4
    • D -4

Answer key

1. A, 2. A, 3. C, 4. C, 5. A, 6. C

  1. Neutral solutions have pH 7.

  2. Hydrochloric acid ionises completely in water.

  3. Blue litmus turns red in acids.

  4. This is neutralisation.

  5. pH below 7 is acidic.

  6. pH = -log(10^-4) = 4.