CBSE Class 10 Science 2019 · Paper 31/3/1 · Question 22(a)
What is observed after about 1 hour of adding the strips of copper and aluminium separately to ferrous sulphate solution filled in two beakers ? Name the reaction if any change in colour is noticed. Also, write chemical equation for the reaction.
Answer
Copper shows no change; aluminium turns the solution colourless with an iron deposit, a displacement reaction.
Copper strip: no change is observed - the solution stays pale green and nothing is deposited on the copper, because copper is less reactive than iron and cannot displace it.
Aluminium strip: the pale green colour of the solution fades and the solution becomes colourless, and a greyish-black deposit of iron forms on the aluminium strip, because aluminium is more reactive than iron.
The reaction in the aluminium beaker is a displacement reaction:
🔒 Step-by-step solution
Sign up free to see every step of how it is worked out.
From the board papers
More questions from Metals and Non-metals
Class 10 Science — every question with an expert-verified, step-by-step solution.
- Q1 Which of the following pairs will give displacement reactions?
- Q1 Give an example of a metal which (i) is a liquid at room temperat…
- Q2 Which of the following methods is suitable for preventing an iron…
- Q2 Explain the meanings of malleable and ductile.
- Q3 An element reacts with oxygen to give a compound with a high meltin…
- Q4 Food cans are coated with tin and not with zinc because
- Q5 You are given a hammer, a battery, a bulb, wires and a switch. (a)…
- Q6 What are amphoteric oxides? Give two examples of amphoteric oxide…
- Q7 Name two metals which will displace hydrogen from dilute acids, a…
- Q8 In the electrolytic refining of a metal M, what would you take a…
- Q9 Pratyush took sulphur powder on a spatula and heated it. He collected…
- Q10 State two ways to prevent the rusting of iron.
All 344 questions on Metals and Non-metals → Browse all Science chapters →