Question

ASSERTION :Zinc’s non corrosive property is utilized in the process of galvanization.
REASON: Galvanization refers to an electrodeposition process used to add a thin layer of another metal to an item made of steel in order to prevent rusting.
Which of the following options is correct?
A.Both assertion and reason are correct and reason is the correct explanation for assertion.
B.Both assertion and reason are correct but reason is not the correct explanation for assertion
C.Assertion is correct but reason is incorrect
D.Both assertion and reason are incorrect.

Answer 1

Zinc is a chemical element with non corrosive properties. Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron to prevent rusting.

Complete Step by step answer: Zinc is a chemical element with the symbol Zn and with atomic number 30. It is slightly brittle metal at room temperature and has a blue silvery appearance when oxidation is removed. It is the first element of group 12 of the periodic table. It is the 24th most audited element in Earth’s crust and has five stable isotopes. Corrosion resistant zinc plating of iron is the major application for zinc.
Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron to prevent rusting. The most common method is hot-dip galvanizing in which the parts are submerged in a bath of molten hot zinc. Galvanizing protects the underlying iron or steel in the following ways:
The zinc coating prevents corrosive substances from reaching the underlying steel or iron.
For better results, application of chromates over zinc is also seen as an industrial trend.
Also, in the event the underlying metal becomes exposed, protection can continue as long as there is zinc close enough to be electrically coupled. After all of the zinc in the immediate area is consumed, localized corrosion of the base metal can occur.
Although galvanizing will inhibit attack of the underlying steel, rusting will be inevitable after some decade’s exposure to weather especially if exposed to acidic conditions. For example corrugated iron sheet roofing will start to degrade within a few years despite the protective action of zinc coating. Marine and salty environments also lower the lifetime of galvanized iron because the high electrical conductivity of sea water increases the rate of corrosion primarily through converting the solid zinc to soluble zinc chloride which simply washes away.
From the above information we get to know that both assertion and reason are correct and reason is the correct explanation of assertion.

Therefore, the correct answer is option A.

Note: Zinc is a chemical element with non corrosive properties. Galvanization or galvanizing is the process of applying a protective zinc coating to steel or iron to prevent rusting. The zinc coating prevents corrosive substances from reaching the underlying steel or iron.