One of the nitrogenous liquid base, that is recovered from coal tar, is:
A
histidine
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B
pyridine
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C
sulphide
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D
ammonia
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Solution
The correct option is B pyridine Tar bases are the alkaline constituents of distillate oils, remaining after tar acids have been removed. One of the base that is recovered is pyridine, a colourless nitrogenous liquid that has a pungent odour and produces derivatives that are of pharmaceutical value.