CBSE Class 10 Science 2019 · Paper 31/5/1 · Question 22
What would you observe on adding zinc granules to freshly prepared ferrous sulphate solution ? Give reason for your answer.
Answer
The pale green solution turns colourless and iron deposits on the zinc, because zinc is more reactive than iron and displaces it.
Observation: the pale green colour of the ferrous sulphate solution fades and the solution becomes colourless, and a black (dark grey) coating is deposited on the zinc granules.
Reason: zinc is more reactive than iron (it lies above iron in the reactivity series), so it displaces iron from ferrous sulphate. Colourless zinc sulphate forms and the displaced iron deposits on the zinc:
🔒 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 →