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iGCSE - Chemistry paper 3 - Acids and Bases

Question 1 of 7

1

What is meant by Amphoteric?

Select one of the following:

  • A molecule or ion that can react as an acid and a base.

  • Able to breathe both in water and on land.

  • A substance with pH < 7

Explanation

Question 2 of 7

1

Acids react with metals to form salts

Select one of the following:

  • True
  • False

Explanation

Question 3 of 7

1

What kind of Indicator turns yellow in alkali?

Select one of the following:

  • Litmus

  • Phenolpthalein

  • Methyl orange

Explanation

Question 4 of 7

1

pH value for a strong acid?

Select one of the following:

  • 1-2

  • 12-14

  • 7

Explanation

Question 5 of 7

1

Which of these is NOT an example of a base

Select one of the following:

  • Metal oxides

  • Hydroxides

  • Nitrates

  • Ammonia

Explanation

Question 6 of 7

1

Bases neutralise acids, forming a ______ and ______

Select one of the following:

  • Salt, Water

  • Salt, Hydrogen

  • Salt, Oxygen

Explanation

Question 7 of 7

1

Reacting a base with an ammonium compound (an example of a base reaction) gives ammonia as a product as well as salt and water

Select one of the following:

  • True
  • False

Explanation