EASY
Lower Secondary Stage 8
IMPORTANT
Earn 100

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The particle diagram shows how hydrogen gas is formed in the reaction between hydrochloric acid and magnesium metal.

Use the idea of particles to explain why the pieces of magnesium get becomes smaller.

Important Questions on Chemical Reactions

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 7>Q 3
Name the salt made when calcium reacts with hydrochloric acid.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 7>Q 4
Write the word equation for the reaction between tin and sulphuric acid.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 7>Q 4
Write the word equation for the reaction between aluminium and hydrochloric acid.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 8>Q 6
Marble statues can be damaged over time because of acid rain. Suggest why this happens.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 9>Q 7
Write a word equation for the reaction between zinc carbonate and sulphuric acid.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 9>Q 7
Write a word equation for: What happens when carbon dioxide is bubbled through lime water.
HARD
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 11>Q 1
Explain, how a new theory (particle theory) helped change ideas about what happens when substances burn.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Cambridge Lower Secondary Science Stage 8 : Student's book>Chapter 6 - Chemical Reactions>Exercise 11>Q 2
Plan a way of collecting evidence to prove that carbon dioxide is made when carbon burns.