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Standard X

Chemistry

Extraction of Iron

A student pla...

Question

A student placed Zn rod in FeSO_4 solution. After 10 hours when rod was taken out and it was observed that :

(a) Zn rod became harmer.

(b) Zn rod became thicker due to Iron deposition.

(c) Zn rod remains as it was.

(d) Zn rod has holes.

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Solution

(d) Zn rod has holes.

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Similar questions

Q. A Zn rod weighing

25

g was kept in

100

mL of

1

C u S O_{4}

solution. After a certain time the molarity of

C u^{2 +}

in solution was

0.8

. What was the weight of Zn rod after cleaning? At. weight of Zn

= 65.4

Q. A Zn rod weighing 25 g was kept in 100mL of 1 M

C u S O 4

solution. After a certain time, the molarity of

C l^{2 +}

in solution was 0.8. What was the molarity of

{S O}_{4}^{2 -}

? What was the mass of the

Z n

rod after cleaning?

(The atomic mass of

Z n = 65.4

)

During electrochemical process, when 2 rods, Zn and Cu are taken in seperate containers why does Zn releases 2 electrons and Cu accepts it and NOT vice versa?

Q. Some equipments and materials are given.

Z n {S O}_{4}

solution,

C u {S O}_{4}

solution,

Z n

rod,

C u

rod, Voltmeter,

K C l

solution, filter paper.
(a) Draw the diagram of the electrochemical cell which can be constructed using these equipments and materials and label the pans.
(b) Write equations of chemical reactions taking place in the two electrodes of this cell.
(Hint: reactivity

Z n > C u

)

Q. A zinc rod is dipped in

0.1

M solution of

Z n S O_{4}

. The salt is

95 %

dissociated at this

298

K. Calculate the electrode potential

[E_{Z n^{+ +} / Z n}^{0} = - 0.76 e V]

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A student placed Zn rod in FeSO_4 solution. After 10 hours when rod was taken out and it was observed that : (a) Zn rod became harmer. (b) Zn rod became thicker due to Iron deposition. (c) Zn rod remains as it was. (d) Zn rod has holes.

(d) Zn rod has holes.

A student placed Zn rod in FeSO_4 solution. After 10 hours when rod was taken out and it was observed that :

(a) Zn rod became harmer.

(b) Zn rod became thicker due to Iron deposition.

(c) Zn rod remains as it was.

(d) Zn rod has holes.