Question

(d) Iron А (d) Diamond (d) Zinc (d) Iodine : Choose the correct malleable and ductile? Cr (b) Copper (c) Sodium (a) Silver So 2. Which of the following is a good conductor of electric current? (a) Sulphur (b) Graphite (c) Silicon 3. Which of the following is used in the preparation of bulletproof alloy steel? (a) Zirconium (b) Iron (c) Silver 4. Which of the following is a liquid at room temperature? (a) Chlorine (b) Phosphorous (0) Bromine 5. Which of the following is corrosion-resistant? (a) Silver (b) Iron (c) Copper 6. Which of the following is mixed with iron to make it rust-proof? (a) Carbon (b) Nickel (c) Chromium 7. In a displacement reaction, which of the following can displace zinc from a sole zinc II sulphate? (a) Iron (b) Copper Calcium (d) Silver 8. Metals react with oxygen on burning to produce metal oxides which are (a) acidic in nature, (b) basic in nature. (c) neither acidic nor basic in nature, (d) both acidic and basic in nature. (d) Aluminium (d) All of them 68





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