METALS AND ALLOYS MCQs

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1. . The cuprite ore of copper is:





2. . Iron reacts chemically with steam to form:





3. . Iron reacts with concentrated sulphuric acid to liberate gas:





4. . Copper reacts with concentrated nitric acid to liberate gas:





5. . Aluminium reacts with dilute nitric acid to liberate gas:





6. . The siderite ore of iron is:





7. . The cryolite ore of aluminium is:





8. . Thermite reaction is the reaction of metal oxide with:





9. . Which metal gives blue colour with ammonia solution:





10. . Which metal is liquid at room temperature:





11. . In corrosion the chemical reaction is:





12. . Which one of the following causes corrosion of iron:





13. . Which one of the following metal does not corrode:





14. . A process in which metal is protected from corrosion by dipping it in molten zinc is called:





15. . The bonding together of dissimilar metals by pressure is called:





16. . The most important property of stainless steel is its:





17. . In bronze percentage of copper is:





18. . Nichrome is an alloy of nickel, chromium and:





19. . Which alloy is used to fill dental cavities:





20. . Which alloy has iron:





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