Examlex
Which of the following best describes the first cities in Mesopotamia?
HNO3
Nitric acid, a highly corrosive and toxic strong mineral acid used in the production of fertilizers, explosives, and in the pickling of metals.
P-nitroanisole
An organic compound consisting of an anisole group where a nitro group is attached to the para position of the anisole ring.
Nitro Group
A nitro group is a functional group consisting of a nitrogen atom bonded to two oxygen atoms (−NO2), often contributing to the reactivity of a molecule.
O,p-director
Refers to substituents on an aromatic ring that direct incoming substituents to the ortho and para positions relative to themselves during electrophilic aromatic substitution reactions.
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