Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 8 Answered

karthik took three test  tubes 'x','y','z'with zinc sulphate solution in all the test tubes .hedropped a piece of copper ,aluminium,iron in each tube .in which testtube does the reaction takes place.why? write balanced equation for it?
Asked by arajeevshashank | 11 Aug, 2018, 03:30: PM
answered-by-expert Expert Answer
When a piece of copper is dipped in the solution of ZnSO4 there will be no reaction because according to the reactivity series the copper is below the zinc hence it is less reactive to displace zinc from zinc sulphate.
 
When a piece of aluminium is dipped in the solution of ZnSO4, according to the reactivity series aluminium is more reactive than zinc hence it displaces zinc from its salt solution. the reaction takes place as 
 
2 Al space plus 3 ZnSO subscript 4 space rightwards arrow with blank on top space Al subscript 2 left parenthesis SO subscript 4 right parenthesis subscript 3 space plus 3 space Zn
When a piece of iron is dipped in the solution of ZnSO4, no reaction takes place because according to reactivity series iron is less reactive than zinc.
Answered by Ramandeep | 11 Aug, 2018, 07:29: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 8 - Science
what is displacement reaction ?
Asked by ayanking905 | 17 Feb, 2023, 11:49: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
why copper cannot displace zinc from its salt solution
Asked by jashanpreetsingh9567 | 29 May, 2021, 07:11: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
what do you observe when copper sulphate is reacted with lead?what is the product?
Asked by atharva.lad24 | 08 Nov, 2019, 10:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
How will you show with the help of an experiment that copper is more reactive than silver? 
Asked by rajubarman | 10 Jul, 2019, 09:24: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
karthik took three test  tubes 'x','y','z'with zinc sulphate solution in all the test tubes .hedropped a piece of copper ,aluminium,iron in each tube .in which testtube does the reaction takes place.why? write balanced equation for it?
Asked by arajeevshashank | 11 Aug, 2018, 03:30: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
copper cannot displace iron from iron sulphate solution give reason
Asked by rijukurakar | 04 Jul, 2018, 10:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
(i) Why does the colour of iron sulphate solution change when zinc is added to the solution? (ii) What change in colour is observed?
Asked by Topperlearning User | 30 Apr, 2014, 03:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
(i) Why does copper coin dissolve in the solution of silver nitrate if it is immersed in it for some time? (ii) What colour change is observed?
Asked by Topperlearning User | 30 Apr, 2014, 03:17: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
(i) What happens when a piece of copper metal is placed in iron sulphate solution? (ii) Express the following fact in the form of a chemical equation: When a strip of copper metal is placed in a solution of silver nitrate, metallic silver is precipitated and a solution containing copper nitrate is formed.
Asked by Topperlearning User | 30 Apr, 2014, 03:13: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Science
Explain why iron metal can displace copper form copper sulphate solution but copper cannot displace iron from iron sulphate solution.
Asked by Topperlearning User | 30 Apr, 2014, 03:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×