Metals and Non-metals MCQ Quiz - Multiple Choice Questions & Answers Page 4

31. Nonmetals react with hydrogen to form

1. Covalent compounds
2. Ionic compounds
3. Electrovalent compounds
4. Coordinate compounds

32. Mercury is used in thermometers because

1. It does not wet the glass
2. It expands on heating
3. It is a liquid
4. All of these

33. ________ is used to make photographic films.

1. Sodium chloride
2. Silver bromide
3. Potassium iodide
4. Copper chloride

34. A crucible used in lab to heat solid at high temperature is made of

1. Sulphur
2. Silicon
3. Graphite
4. Phosphorous

35. The nonmetal used to treat rubber in the process of vulcanizations

1. Sulphur
2. Phosphorous
3. Carbon
4. Chloride

36. Due to its semiconductor properties, the nonmetal used in computers, TV, etc. is

1. Carbon
2. Silicon
3. Bromine
4. Fluorine

37. In the native state of metal, it is present

1. As a mixture with a metal
2. In free state
3. As a mixture with a nonmetal
4. As a mixture with a compound

38. Which of the following metal is present in native state?

1. Platinum
2. Iron
3. Potassium
4. Copper

39. Which of the following is called as noble metal?

1. Mercury
2. Gold
3. Lithium
4. Cesium

40. Which of the following statement is true?

1. All minerals are ores
2. All minerals are not ores
3. All ores are not minerals
4. Some ores are minerals