Question

when we place an iron nail in copper sulphate solution the reddish brown coating formed an iron nail is..........
a)soft and dull
b)hard and flaky
c)smooth and shining
d)rough and granular​

Answer 1

b.. hard and flaky ...... t

Answer 2

(b).Iron nail in copper sulphate solution the reddish brown coating formed an iron nail is "Hard and flaky".

Explanation:

• $CuSO4+Fe ---FeSO4+CuCuSO4$= Copper Sulphate ( blue )Fe = Iron nail ( black ) FeSO4 = Iron Sulphate ( Green )Cu = Copper ( Reddish brown ).The reaction in which High metal displace the less reactive metaled.
• In these above Iron ( Fe ) is more reactive metal than the Copper ( Cu ) Because Iron ( Fe ) will displace the Copper ( Cu ).
• When we place an iron nail in copper sulphate solution the reddish brown coating formed an iron nail is hard and flaky.
• When an iron nail is dipped in copper sulphate solution, the surface of the iron develops a brown copper coating, and the color of the copper sulphate solution changes from blue to pale green. Iron is more reactive than copper because it is higher in the reactivity series.
• As a result, the more reactive metal (iron) pushes a less reactive metal (copper) out of the salt solution (copper sulphate solution).
• As a result, the hue has changed. Rust forms on an iron nail when it comes into contact with moisture, turning it brownish in color.