Question

Iron objects can be protected by electroplating them with
(a) chromium
(b) nickel
(c) zinc
(d) all of these

Answer 1

Answer:

All of these.

Explanation:

Metals can be protected against corrosion by electroplating them with less reactive metals on their surface. For example, iron is protected against corrosion by electroplating of nickel and zinc on its surface.

Answer 2

all of these

Explanation:

We use all the above mentioned processes to protect steel, cast iron, copper from corrosion.

1. chromium is used in chrome process where a fine layer of chrome is played on substrate metal.

2. Zn and nickel are used together as an alloy in galvanic process or the same purpose