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प्रश्न
Do we find plastic, nylon, brass or cement in nature?
दीर्घउत्तर
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उत्तर
No, we do not find plastic, nylon, brass or cement in nature in their finished form. These are man-made substances prepared by humans using natural substances.
- Plastic is made from chemicals obtained mainly from petroleum.
- Nylon is a synthetic fibre made from chemicals.
- Brass is an alloy made by mixing copper and zinc.
- Cement is manufactured from materials such as limestone, clay and other minerals.
Thus, plastic, nylon, brass and cement are man-made substances, not naturally occurring substances.
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