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Fill in the blanks 1. Elements can be classified as ……… and ……. . 2. Two examples of metals which are poor conductors of heat are ………, ……… . 3. Two metals which melt when kept on the palm are ………, ……… . 4. A non-metal which is a good conductor of electricity is ……… . 5. Metals can form positive ions by ……… . 6. A non-metal which is lustrous is ……… . 7. A metal which burns in air with a dazzling white flame is ……… . 8. Metals above hydrogen in the activity series can displace ……… from dilute acids. 9. The extraction of metals from their ores and then refining them for use is known as ……… . 10. ……… is an allotroph of carbon and is the hardest natural substance. 11. Metals which are so soft that they can be cut with a knife are ………, ……… 12. Metal oxides ……… and ……… dissolve in water to form alkalis.

Fill in the blanks

1. Elements can be classified as ……… and ……. .
2. Two examples of metals which are poor conductors of heat are ………, ……… .
3. Two metals which melt when kept on the palm are ………, ……… .
4. A non-metal which is a good conductor of electricity is ……… .
5. Metals can form positive ions by ……… .
6. A non-metal which is lustrous is ……… .
7. A metal which burns in air with a dazzling white flame is ……… .
8. Metals above hydrogen in the activity series can displace ……… from dilute acids.
9. The extraction of metals from their ores and then refining them for use is known as ……… .
10. ……… is an allotroph of carbon and is the hardest natural substance.
11. Metals which are so soft that they can be cut with a knife are ………, ………
12. Metal oxides ……… and ……… dissolve in water to form alkalis.

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60782 Points
one year ago
1. metals, non-metals 2. Lead, Mercury 3. Gallium, Caesium 4. Graphite 5. losing electrons 6. Iodine 7. Magnesium 8. Hydrogen 9. metallurgy 10. Diamond 11. Sodium, Potassium 12. Sodium Oxide and Potassium oxide

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