Q1. Diamond has:
Q2. Elements are better classified as metals and non-metals on the basis of:
Q3. Aluminium oxide is an example of:
Q4. Alkali metals have:
Q5. Alkali metals are generally:
Q6. Carbon exists in different forms called:
Q7. Oxides that react with both acids and bases are called:
Q8. The oxide formed when magnesium burns is:
Q9. Most metals form ______ oxides:
Q10. Which non-metal exists in solid or gaseous state?
Q11. Metals generally have:
Q12. Most non-metals form ______ oxides:
Q13. Which metal reacts vigorously with oxygen?
Q14. Graphite is unusual because it:
Q15. Aluminium oxide reacts with sodium hydroxide to form:
Q16. Sodium oxide dissolves in water to form:
Q17. Which metal can be easily cut with a knife?
Q18. Bromine is a non-metal that is:
Q19. Which metal is liquid at room temperature?
Q20. The ability of metals to be drawn into thin wires is called:
Q21. Which metal is the best conductor of heat?
Q22. Which metal is a poor conductor of heat?
Q23. The ability of metals to be beaten into thin sheets is called:
Q24. The ringing sound produced by metals is due to:
Q25. Potassium oxide dissolves in water to form:
Q26. Sulphur on burning forms an oxide that is:
Q27. Which allotrope of carbon conducts electricity?
Q28. Chemical reaction of metals with oxygen mainly produces:
Q29. Magnesium oxide dissolved in water is:
Q30. Which metal oxide dissolves in water to form an alkali?
Q31. Aluminium oxide reacts with acids to form:
Q32. Metals like gallium and caesium melt on the palm because they have:
Q33. Metals produce sound on striking because they are:
Q34. Mercury is an exception because it is:
Q35. Metals generally have a shining surface called:
Q36. Physical properties alone cannot classify elements because:
Q37. Sulphur dioxide dissolved in water turns blue litmus:
Q38. Non-metals are generally:
Q39. Which metal forms a black oxide on heating in air?
Q40. Which property allows metals to be used for cooking vessels?
Q41. The general reaction of metals with oxygen is:
Q42. Which non-metal is lustrous?
Q43. Which allotrope of carbon is the hardest natural substance?
Q44. All metals do not react with oxygen at the same rate due to difference in:
Q45. Non-metals are generally:
Q46. Metals are good conductors of:
Q47. Magnesium burns in air with a:
Q48. Which oxide shows both acidic and basic behaviour?
Q49. Metals are usually:
Q50. The ashes formed after burning magnesium turn red litmus: