A. Dry air B. Sunlight C. Moisture D. Pure oxygen
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A. Slaked lime B. Quick lime C. Lime stone D. Sodium hydroxide
A. Total internal reflection B. Reflection C. Refraction D. None of these
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A. More soft B. More ductile C. More metallic D. More brittle
A. C- C bonds B. C=C bonds C. Mobile electrons D. Bonded electrons
A. Polypropylene B. Glyptal C. Nylon-6,6 D. Nylon-6
A. Fe B. An alkali metal C. Silver D. Mercury
A. Toluene B. Nitrobenzene C. Chlorobenzene D. Sulpho benzene
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