InterviewSolution
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Match List-I with List-II and select the correct answer from the codes given below:List-I List-IIA. Silicon carbide1. Photosynthesis B. Carbon fibre2. RefrigerantC. Carbon dioxide3. Artificial diamondD. Dichloro-difluro- methane4. AircraftCodes: |
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Answer» The correct option is : (B) Explanation: As a gemstone used in jewellery, silicon carbide is called "synthetic moissanite" or just "moissanite". Moissanite is similar to diamond in several important respects it is transparent and hard. Moissanite has become popular as a diamond substitute, and may be misidentified as diamond, since its thermal conductivity is close to that of diamond, more than any other diamond substitute. The properties of carbon fibres, such as high stiffness, high tensile strength, low weight, high chemical resistance, high-temperature tolerance and low thermal expansion, make them very popular in aerospace, civil engineering, military, and motorsports. Dichlorodifluoromethane (R-12) is a colourless gas, and usually sold under the brand nameFreon-12, is a chlorofluorocarbon halo-methane (CFC), used as a refrigerant and aerosol spray propellant. In photosynthesis, solar energy is converted to chemical energy. The chemical energy is stored in the form of glucose (sugar). Carbon dioxide, water, and sunlight are used to produce glucose, oxygen, and water. |
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