Sample pieces of five metals A, …

CBSE, JEE, NEET, NDA

CBSE, JEE, NEET, NDA

Question Bank, Mock Tests, Exam Papers

NCERT Solutions, Sample Papers, Notes, Videos

Sample pieces of five metals A, B, C, D and E were added to the tabulated solutions separately. The results observed are shown in the table: Metal      A No Change No Change No Change Coating on metal No Change B Grey Deposit on metal Brown Coating on metal No Change Coating on metal No Change C No Change No Change No Change No Change No Change D No Change ---------- No Change Coating on metal No Change E ----------- Brown coating New coating New coating No Change Based on the observations recorded in the table, answer the following: (1) Which is the most reactive metal? (2) Which is the least reactive metal? (3) What would be observed if metal D were added to a solution of copper (II) sulphate? (4) What would be observed if metal E were added to a solution of iron (II) sulphate? (5) Arrange the metals A, B, C, D and E in decreasing order to their reactivity?
  • 1 answers

Preeti Dabral 1 month, 1 week ago

(1) Metal E is most reactive because it displaces zinc from {tex}ZnSO_4{/tex} solution.
(2) Metal C is the least reactive since it has not displaced any of the metals from their respective salt solutions.
(3) Metal D is more reactive than Ag and less reactive than Fe. It can displace Cu from {tex}CuSO_4{/tex} solution.
(4) Since metal E has displaced Zn from {tex}ZnSO_4{/tex} solution, it is more reactive than Zinc. It is therefore expected to be more reactive than iron as well because iron is placed below zinc in the reactive series. Therefore, metal E displaces Fe from {tex}FeSO_4{/tex} solution. A grey /black coating of iron will be deposited on the metal E.
(5) Decreasing order of reactivity E>B>D>A>C

http://mycbseguide.com/examin8/

Related Questions:

What is PH of Body?
  • 2 answers
Which of the following is exothermic reaction
  • 2 answers
The body part
  • 1 answers
Define circular motion
  • 1 answers
Who won Vivo ipl 2021?
  • 5 answers

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

CBSE Test Generator

Create papers in minutes

Print with your name & Logo

Download as PDF

3 Lakhs+ Questions

Solutions Included

Based on CBSE Blueprint

Best fit for Schools & Tutors

Work from Home

  • Work from home with us
  • Create questions or review them from home

No software required, no contract to sign. Simply apply as teacher, take eligibility test and start working with us. Required desktop or laptop with internet connection