Question

Iron can be prevented from rusting by:
A. Connecting iron to more electropositive metal is a case of cathodic protection.
B. Connecting iron to more electropositive metal is a case of anodic protection.
C. Connecting iron to less electropositive metal a case of anodic protection.
D. Connecting iron to less electropositive metal a case of cathodic protection.

Answer 1

One of the cycles of forestalling rusting is a kind of boundary strategy, all things considered; it is all the more precisely a "conciliatory" technique wherein the iron is covered with a more responsive metal, for example, zinc. The different cycle incorporates blending it in with different techniques to keep it from rusting.

Complete step by step answer:
Cathodic insurance: A procedure to control consumption of a metal surface by making it fill in as a cathode of an electrochemical cell by putting in contact with the metal to ensure another all the more handily eroded metal to go about as the anode of the electrochemical cell. Most regularly used to secure steel, water pipelines, and capacity tanks.
Anodic assurance: A procedure to control consumption of a metal by making it fills in as anode building up an inactive film on the metal. It is utilized in amazingly destructive conditions and most widely used to store and deal with sulphuric corrosive holders.

So, the correct answer is Option A,C.

Note: rusting can be prevented by:
Galvanization: When the iron article is secured with a layer of zinc metal by then it shields the iron from interacting with oxygen and moisture. Along these lines, rusting can be forestalled.
(ii)By alloying - blending iron in with another metal/non-metal to keep it from rusting
Other than a barrier and sacrificial methods, rusting can also be prevented by using anti-rust solutions like alkaline chromate and alkaline phosphate solutions.