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Q: Nicotine from tobacco is an alkaloid which is-
  • A. Oxygen free liquid
  • B. Semisolid
  • C. Crystalline
  • D. Oxygen free solid
Correct Answer: Option A - Oxygen free alkaloids such as nicotine or conine are typically volatile, colourless, oily liquids. Nicotine is one of the few liquid alkaloids. In its pure odourless liquid with an oily consistency but when exposed to light or air it acquires a brown color and gives off a strong odour of tobacco. Nicotine's chemical formula is C₁₀H₁₄N₂ .
A. Oxygen free alkaloids such as nicotine or conine are typically volatile, colourless, oily liquids. Nicotine is one of the few liquid alkaloids. In its pure odourless liquid with an oily consistency but when exposed to light or air it acquires a brown color and gives off a strong odour of tobacco. Nicotine's chemical formula is C₁₀H₁₄N₂ .

Explanations:

Oxygen free alkaloids such as nicotine or conine are typically volatile, colourless, oily liquids. Nicotine is one of the few liquid alkaloids. In its pure odourless liquid with an oily consistency but when exposed to light or air it acquires a brown color and gives off a strong odour of tobacco. Nicotine's chemical formula is C₁₀H₁₄N₂ .