Which of the Following Is an Example of Smelting

question 32

Multiple Choice

Which of the following is an example of smelting?

• A) 2 PbS(s) + 3 O₂(g) 2 PbO(s) + 2 SO₂(g)
• B) 4 PbCO₃(s) + O₂(g) 2 Pb₂O₃(s) + 4 CO₂(g)
• C) PbCO₃(s) + SiO₂(s) PbSiO₃(l) + CO₂(g)
• D) PbCO₃(s) PbO(s) + CO₂(g)
• E) ZnO(s) + CO(g) Zn(l) + CO₂(g)

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Definitions:

Bone And Cartilage

Connective tissues in animals; bones provide structural support and protection, while cartilage reduces friction and acts as a cushion between joints.

Ectoderm

The outermost of the three primary layers in an embryo, from which the skin, nervous system, and sense organs develop.

Germ Layer

One of the three primary layers of cells (ectoderm, mesoderm, and endoderm) in the very early embryo, from which all tissues and organs develop.

Digestive Tube

The tubular passage functioning in the digestion and absorption of food and the elimination of food residues, stretching from the mouth to the anus.