Question

In a school laboratory, beakers A, B, C and D are arranged as follows:(i) Beaker (A): iron rod dipped in iron sulphate solution(ii) Beaker (B): iron rod dipped in zinc sulphate solution(iii) Beaker (C): iron rod dipped in copper sulphate solution(iv) Beaker (D): iron rod dipped in aluminium sulphate solutionThe beaker in which a metal will deposit on iron rod is
.
.
.
.
.



1.beaker beaker (A).
2.beaker (B).
3.beaker (C).
4.beaker (D).
select one option

Answer 1

Answer:

8th

Chemistry

Materials: Metals and Non-Metals

Chemical Properties of Metals and Non Metals

Four students A, B, C, and ...

CHEMISTRY

Four students A, B, C, and D noted the initial colour of the solution in beakers I, II, III and IV. After inserting zinc rods in each solution and leaving it undisturbed for two hours, noted the colour of each solution again.

The recorded observations in the form of the table given below:

Which student noted the colour change in all the four beakers correctly.

question

December 30, 2019

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Afsha Shriya

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ANSWER

The student designated as (A) made the correct observation.

In breaker (I),the solution remained colourless or unchanged in colour since no chemical reaction was possible.Actually,aluminium is placed above zinc in the activity series.

In beaker (II),no chemical reaction was possible and the solution remained colourless.

In beaker (III), the initial colour of ferrous sulphate solution was light green .It became colourless after the reaction.

Zn(s)+FeSO

4

(aq)→ZnSO

4

(aq)+Fe(s)

Blue Colourless

In beaker (IV), the initial colour of ferrous sulphate solution was blue .It became colourless after the reaction.

Zn(s)+CuSO

4

(aq)→ZnSO

4

(aq)+Cu(s)

Blue Colourless

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