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Question

Which of the following is used as a lubricant?

A
Helianthus annuus
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B
Carthamus tinctorius
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C
Ricinus communis
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D
Cocos nucifera
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Solution

The correct option is C Ricinus communis
Castor oil is a vegetable oil obtained by pressing the seeds of the castor oil plant (Ricinus communis). Castor oil and its derivatives are used in the manufacturing of soaps, lubricants, hydraulic and brake fluids, paints, dyes, coatings, inks, cold resistant plastics, waxes and polishes, nylon, pharmaceuticals and perfumes.
Castor oil is majorly used as lubricant compared to Helianthus (sunflower), Carthamus (safflower) and Cocos (coconut) because of its thick texture.
Thus, the correct answer is option C.

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