IGCSEScienceEdexcelScience (Double Award) (Modular)Chemistry Unit 1Exam Questions2. Inorganic Chemistry: Part 1Acids, alkalis & titrations

Acids, alkalis & titrations (Edexcel IGCSE Science (Double Award) (Modular): Chemistry Unit 1): Exam Questions

Exam code: 4XSD1

12 mins6 questions
Easy
Medium
1a
1 mark

Which of these is the colour of litmus indicator in an acidic solution?

  • blue

  • orange

  • red

  • yellow

Choose your answer

1b
1 mark

Which of these is the pH value of a neutral solution?

  • 0

  • 4

  • 7

  • 14

Choose your answer

1c
1 mark

Which of these describes a solution with a pH value of 9?

  • Strongly acidic

  • Strongly alkaline

  • Weakly acidic

  • Weakly alkaline

Choose your answer

1d
1 mark

Which of these is the chemical formula of an acid?

  • HNO3

  • H2O

  • NaCl

  • NaOH

Choose your answer

1e
1 mark

Name the type of reaction that occurs when an acid reacts with an alkali.

How did you do?

1f
2 marks

Name the two products of the reaction between hydrochloric acid and potassium hydroxide.

How did you do?

2
1 mark

A student is carrying out a titration using phenolphthalein indicator. 

What is the correct colour of this indicator in an acid and alkali? 

  • Colour in acid: pink
    Colour in alkali: colourless

  • Colour in acid: colourless
    Colour in alkali: pink

  • Colour in acid: red
    Colour in alkali: yellow

  • Colour in acid: orange
    Colour in alkali: red

Choose your answer

3
1 mark

What is the pH of a weak acid?

  • 2

  • 6

  • 7

  • 11

Choose your answer

4
1 mark

Carbonic acid is found in fizzy drinks and has the formula, H2CO3.

Which ion causes the drink to be acidic?

  • OH-

  • CO32-

  • H+

  • O2-

Choose your answer

5
1 mark

Methyl orange is used as an indicator. 

What is the colour of it in an alkaline solution?

  • Yellow

  • Orange

  • Red

  • Blue

Choose your answer

1
1 mark

A student added some sulfuric acid gradually to a solution of ammonia until it was in excess.

What happens to the pH during this reaction?

  • pH of ammonia at start: 11
    pH after excess sulfuric acid: 7

  • pH of ammonia at start: 7
    pH after excess sulfuric acid: 13

  • pH of ammonia at start: 11
    pH after excess sulfuric acid: 2

  • pH of ammonia at start: 3
    pH after excess sulfuric acid: 8

Choose your answer