24u r rite....but concept plz....i know it cnat be b,c
but why not d ???
Zinc copper couple cna be used as a reducing agent is obtained by
a)mixing zinc dust with copper gauze
b)zinc coated with copper
c)copper coated with zinc
d)zinc and copper wires welded together
Plz tell me the concept behind it
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5 Answers
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1i think its just because of the fact that zinc dust goes into the holes of the copper gauze...not sure...
1Actually , if zinc and copper wires are welded together , product would be a type of alloy , with less reactivity than actual metals.
but , if powdered Zn is used, its reactivity is more ; as metals are more reactive in powdered form. Copper gauzes are provided to seal the reducing agent from rusting.