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General Principles and processes of Isolation of Elements
easy
In the galvanizing process, iron is coated with zinc. The resulting chemical protection is most similar to that provided when
A
A magnesium bar is connected to an iron pipe
B
An iron can is plated with tin
C
Copper pipes are connected using lead solder
D
A copper pipe is covered with epoxy paint
Solution
Reason is "When iron is coated with zinc, the zinc get oxidized. And when magnesium is connected to an iron bar, Magnesium get oxidized."
So, both the cases are similiar.
Standard 12
Chemistry
Similar Questions
List $-I$ shows reaction involve in metallurgy of $Pb$ (lead) and List $-II$ shows name of processes. Match List $-I$ with List $-II$ and select correct code for your answer.
| List $-I$ | List $-II$ | ||
| $(P)$ | $PbS + 2PbO\xrightarrow{\Delta }3Pb + S{O_2} \uparrow $ | $(1)$ | Smelting |
| $(Q)$ | $PbS + \frac{3}{2}{O_2}\xrightarrow{\Delta }PbO + S{O_2} \uparrow $ | $(2)$ | Self reduction |
| $(R)$ | $PbC{O_3}\xrightarrow{\Delta }PbO + C{O_2} \uparrow $ | $(3)$ | Calcination |
| $(S)$ | $PbO+C\xrightarrow{\Delta }Pb + CO \uparrow $ | $(4)$ | Roasting |
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