Q1. Copper will displace which metal from its salt solution?
Q2. The green coating on copper is:
Q3. Iron does not rust in dry air because:
Q4. 22-carat gold contains:
Q5. Which oxide is basic in nature?
Q6. Non-metals react with hydrogen to form:
Q7. Platinum, gold and silver are used for jewellery because they:
Q8. Stainless steel is an alloy of iron with:
Q9. Metals combine with oxygen to form:
Q10. Which metal will displace copper from copper oxide?
Q11. Copper is used for hot water tanks because:
Q12. Corrosion of iron is commonly called:
Q13. The substance added to a metal to make an alloy may be:
Q14. Which metal is used for galvanisation?
Q15. Pure gold used for jewellery is:
Q16. The process of extraction and refining of metals is called:
Q17. Metals are generally:
Q18. Which metal is liquid at room temperature?
Q19. Metals like zinc, magnesium and copper can form:
Q20. Aluminium oxide is called amphoteric because it:
Q21. Carbonate and sulphide ores are converted into oxides because:
Q22. Metals above hydrogen in the activity series can:
Q23. An alloy containing mercury is called:
Q24. Which method can prevent rusting of an iron frying pan?
Q25. Aluminium is used for cooking utensils because:
Q26. A displacement reaction occurs when:
Q27. Acidic substances clean copper vessels by reacting with:
Q28. Which of the following is NOT a metal property?
Q29. Non-metals form ______ ions by gaining electrons:
Q30. Which non-metal is an exception and conducts electricity?
Q31. Which pair will give a displacement reaction?
Q32. Which metal reacts vigorously with water?
Q33. Sodium and potassium are stored under oil because they:
Q34. Non-metals are generally:
Q35. Which metal will not displace hydrogen from acids?
Q36. Rusting of iron requires:
Q37. Metals generally form ______ ions by losing electrons:
Q38. Galvanisation is the coating of iron with:
Q39. Tarnished copper vessels are cleaned using lemon juice because it:
Q40. Food cans are coated with tin and not zinc because:
Q41. A metal that does not corrode easily belongs to:
Q42. The activity series is arranged in order of:
Q43. Metals occur in nature:
Q44. Metals that do not corrode easily are:
Q45. An alloy is a:
Q46. Non-metals do not displace hydrogen from:
Q47. Which of the following is an amphoteric oxide?
Q48. Which metal is the best conductor of electricity?
Q49. The process of heating an ore in the absence of air to remove volatile impurities is called:
Q50. Which of the following is a noble metal?