CHROMIUM MCQs 20 min Score: 0 Attempted: 0/20 Subscribe 1. Symbol of chromium is: (A) Fe (B) Al (C) Cu (D) Cr 2. Color of chromium is: (A) Reddish (B) Silver white (C) Greenish (D) Blackish grey 3. At 20°C thermal conductivity of chromium is: (A) 80 W/m·K (B) 70 W/m·K (C) 85 W/m·K (D) 91 W/m·K 4. Density of chromium is: (A) 7.85 (B) 7.19 (C) 7.0 (D) 7.50 5. Formula of chrome iron is: (A) FeO·Cr2O3 (B) Cr2O4 (C) Fe2O3·Cr2O3 (D) Cr2O3 6. Fe2O3·Cr2O3 is an alloy of: (A) Chromium (B) Copper (C) Aluminum (D) Iron 7. Ore of chromium is purified by: (A) Froth flotation process (B) Electromagnetic separation (C) Gravity separation (D) None of these 8. Furnace used to purify chromium is: (A) Blast furnace (B) Open hearth furnace (C) Rotary furnace (D) Electrical furnace 9. In rotary furnace temperature is maintained at: (A) 300–600°C (B) 600–900°C (C) 900–1000°C (D) 1400–1500°C 10. Compound used to treat ore in rotary furnace: (A) NaCl (B) CaO (C) Na2CO3 (D) FeO 11. Chromium is extracted after reduction of chromic oxide: (A) 99% (B) 90% (C) 95% (D) 100% 12. Chromium is used in textile industry as: (A) Catalyst (B) Anodizing (C) Mordant (D) None of these 13. Formula of chromium oxide is: (A) CrO (B) All of these (C) Cr2O4 (D) Cr2O3 14. In aircraft industry chromium is used as: (A) Catalyst (B) Mordant (C) Anodizing (D) Oxidizing 15. Chromite is an ore of: (A) Aluminum (B) Iron (C) Copper (D) Chromium 16. Used in paint manufacturing: (A) Dichromate (B) Oxide chromium (C) Lead chromite (D) Chromium oxide 17. Formula of chromite is: (A) FeCr2O4 (B) K2CrO4 (C) PbCrO4 (D) Cr2O3 18. Cr2O3 is an ore of: (A) Aluminum (B) None (C) Nickel (D) Chromium 19. Chromium is used in making of: (A) Polymer (B) Hard wooden (C) (incomplete option in paper) (D) None of these 20. Chromium is used in: (A) Paints (B) Polishes (C) None (D) Both
