Question

Give reasons
a) Silver article becomes black after some time
(b)Zncan desplace copper from Cuso4, solution colour of solution in four
test tubes are green, yellow, blue and colourless which has ZnSO4
solution?
In which case reaction will take place?
Zn/Cuso4solution
Cu/ZnSO4 Solution
Fe/Caso4 Solution
Ce/Feso4Solution
it which case reaction will take place?
Al/ZnSO4,Solution
Zn/AI (S04)3Solution
cu/ZnSo4 Solution
Fe/Znso4, Solution
Four labelled solution A.B.C,D along with Radish-Browni, Dark Grey
Blue, Silver: White. Which has Alluminium strip.
A Students puts four big iron nails in four different test tube with Znso4,
Al(SO4)3Feso4, coating on iron nail well appear?
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Answer 1

Answer:

(a) silver jewellery get tarnished after some time because silver reacts with sulphur in the atmosphere and forms silver sulphide which is black in colour

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