Practice MCQ Questions and answers on Chemistry-GK

Galvanisation or galvanization (or galvanizing as it is most commonly called) is the process of applying a protective zinc coating to iron or steel, to prevent rusting. The most common method is hot dip galvanizing, in which steel sections are submerged in a bath of molten zinc.

Slag is a partially vitreous by-product of the process of smelting ore, which separates the desired metal fraction from the unwanted fraction. A good example is steelmaking slag: quicklime and magnesite are introduced for refractory protection, neutralizing the alumina and silica separated from the metal, and assist in the removal of sulfur and phosphorus from the steel.

Solder is an alloy of Tin and Lead.

Solder is an alloy of Tin and Lead.

Solder is an alloy of Tin and Lead.

Lead ore is most commonly found as lead sulphide (PbS), galena, a heavy, shiny grey metallic ore with a conspicuous cubic cleavage, but locally pyromorphite, lead chlorophosphate (Pb₅(PO₄)3Cl), was worked on Green Hill, near Charterhouse and on Blagdon Hill.

Steel contains 0.1 – 5% carbon.

Wrought iron is purest from of commercial iron.

The most abundant metal in the Earth’s crust is Aluminium.

Of all the aluminium ores, bauxite is the chief ore of aluminium.