Four metals P, Q, R and S are all obtained by the reduction of their oxides with carbon. Metal P is used to form a thin layer over the sheets of metal S to prevent its corrosion. Metal Q is used for electroplating tiffin boxes made of metal S whereas metal R is used in making car batteries. Metals Q and R form an alloy called solder. What are metals P, Q, R and S ? How have you arrived at this conclusion ?
Lakhmir Singh Chemistry Class 10
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The names of the metals P, Q , R, S which are obtained by the reduction of their oxides with carbon are Zinc, Tin, Lead, Iron respectively.
We reach to this conclusion because:
On metal Iron a thin coating of Zinc is formed by the process called galvanization. This coating prevents the iron from getting rusted as zinc has high reactivity and hence protection is given against corrosion.
By electroplating tiffin boxes which are made of Iron with Tin, protection is conferred to iron against outside corrosion.
In the making of car batteries, lead is being used. An alloy solder is formed by combining tin and lead.
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