It is also formed when ortho-aminodiphenylamine is distilled over lead peroxide (0. [Please select]
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They are called ortho, meta, or para compounds, depending upon the position of NO_{2} groups introduced. [Please select]
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OH, gives para- and ortho-nitro-phenol; toluene gives para- and ortho-nitro-toluene; but nitro-benzene forms meta-di-nitro- benzene and benzoic acid, meta-nitro-benzoic acid. [Please select]
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1), then the positions 1 and 2 represent the ortho, 1 and 3 the meta, and 1 and 4 the para compounds. [Please select]
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The ortho compound crystallises in tables, and the para in needles. [Please select]
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When toluene is nitrated, the para and ortho are chiefly formed, and a very little of the meta compound. [Please select]
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8, but ortho-di-nitro-benzene, melting point 118°, and para-di-nitro, melting point 172°, are also produced. [Please select]
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The residue after this treatment is a homogeneous crystalline mass of ortho-para-di-nitro- toluene, of which the solidifying point is 69. [Please select]
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Di-chloro-, di-bromo-benzenes, tri- and hexa-chloro- and bromo-benzenes, are also known; and mono-chloro-, C_{6}H_{4}Cl(CH_{3}), and bromo-toluenes, together with di derivatives in the ortho, meta, and para modifications. [Please select]
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