Q. 614.6( 5 Votes )
A strip of metal X is dipped in a blue coloured salt solution YSO4. After some time, a layer of metal Y form the salt solution is formed on the surface of metal strip X. Metal X is used in galvanization whereas metal Y is used in making electric wires. Metal X and metal Y together form an alloy Z.
(a) What could metal X be?
(b) What could metal Y be?
(c) Name the metal salt YSO4.
(d) What type of chemical reaction takes place when metal X reacts with salt solution YSO4? Write the equation of the chemical reaction involved.
(e) Name the alloy Z.
(b) Metal Y is Copper(Cu)
(c) Metal Salt is Copper Sulphate(CuSO4).
(d) Displacement Reaction takes place.
The chemical equation:
CuSO4 (aq) + Zn (s) ZnSO4 (aq) + Cu (s)
(e) Alloy Z is Brass.
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Which among the following statement(s) is(are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to:
(i) The formation of silver by decomposition of silver chloride
(ii) Sublimation of silver chloride
(iii) Decomposition of chlorine gas from silver chloride
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(i) Reaction of water with quicklime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)Evergreen Science
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