Chemistry - Study Mode

[#446] Solder metal is an alloy of
Correct Answer

(A) Lead and tin

Explanation

Solution: Solder is an alloy of Tin and Lead.

[#447] The most important ore of lead is
Correct Answer

(A) Galena

Explanation

Solution: 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 (Pb 5 (PO 4 )3Cl), was worked on Green Hill, near Charterhouse and on Blagdon Hill.

[#448] Steel contains
Correct Answer

(A) 0.1 – 5% carbon

Explanation

Solution: Steel contains 0.1 – 5% carbon.

[#449] Which is the purest commercial form of iron ?
Correct Answer

(D) Wrought iron

Explanation

Solution: Wrought iron is purest from of commercial iron.

[#450] The most abundant metal in the Earth’s crust is
Correct Answer

(C) Aluminium

Explanation

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