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20. Give reasons for the following:a) Silver and copper lose their shine when they are exposed to air. Name the substance formed orntheir surface in eacb) Tanished copper vesseis are cleaned with tamarind juice.c) Aluminium is more reactive than iron yetiron when both are exposed to air.h casethere is less corrosion of aluminium as compared to |
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Answer» 1.Silver forms silversulphate when in comes in contact with atmospheric gases. and Cu forms CuO when it comes in conatct with atmospheric gases therefore looses their shiness. 2. because tarmarind being acidic in nature removes the impurities from the above surface of the copper vessel. 3.because Al forms aluminium oxide which stops the Al metal from getting further corroded Like my answer if you find it useful! |
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