Question 4
Food cans are coated with tin and not with zinc because:
a) Zinc is costlier than tin
b) Zinc has a higher melting point than tin
c) Zinc is more reactive than tin
d) Zinc is less reactive than tin

Q.

Food cans are coated with tin and not with zinc because

(a) zinc is costlier than tin.

(b) zinc has a higher melting point than tin.

(c) zinc is more reactive than tin.

(d) zinc is less reactive than tin.

Q. Food cans are generally coated with tin rather than zinc because

Q. Food cans are generally coated with tin rather than zinc because ____.

Q. $E^o$ values of three metals are listed given.
$Z{n}_{\left(aq\right)}^{2+}+2e^{-}\to Z{n}_{\left(s\right)};$ $E^o=-0.76$V
$F{e}_{\left(aq\right)}^{2+}+2e^{-}\to 2F{e}_{\left(s\right)};$ $E^o=-0.44$V
$S{n}_{\left(aq\right)}^{2+}+2e^{-}\to S{n}_{\left(S\right)};$ $E^o=-0.14$V
Which of the following statements are correct on the basis of the given information?
(i) Zinc will be corroded in preference to iron if zinc coating is broken on the surface.
(ii) If iron is coated with tin and the coating is broken on the surface then iron will be corroded.
(iii) Zinc is more reactive than iron but tin is less reactive than iron.

Q.

Brass is an alloy of :

(a) Copper and tin, (b) Copper and zinc,

(c) Zinc and lead, (d) Lead and tin.