Choose the INCORRECT Statement

question 93

Multiple Choice

Choose the INCORRECT statement.

• A) Elemental silicon is produced by reduction of SiO₂ with coke.
• B) In silica each silicon atom is bonded directly to four other silicon atoms.
• C) Coke is made by heating coal in the absence of air.
• D) Charcoal is made by heating wood in the absence of air.
• E) Allotropes of carbon include diamond, graphite, fullerenes and nanotubes.

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Definitions:

Adventitia

The outermost layer of the wall of a blood vessel or other tubular structure, consisting of connective tissue.

Cortex

The outer layer of an organ or structure, such as the cerebral cortex of the brain or the cortex of a plant root or stem.

Medulla

The innermost part of an organ or structure, such as the medulla oblongata in the brain which controls vital body functions.

Renal Papilla

The tip of the renal pyramid in the kidney that projects into the minor calyx, where urine is collected before passing into the ureter.