| 1. | Which one among the following is an acidic oxide ? | |
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Al2O3
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CO
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Na2O
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CO2
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Report Question| 2. | Aluminium is used for making cooking utensils. which of the following properties of aluminium are responsible for the same ? | |
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Good thermal conductivity, High melting point
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Good electrical conductivity, Ductility
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Good thermal conductivity, Ductility
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Good thermal conductivity, Good electrical conductivity
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| 3. | The ability of metals to be drawn into thin wire is known as ? | |
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Conductivity
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Ductility
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Sonorousity
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Malleability
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| 4. | Because of high electropositively, the atom of metals can easily form ? | |
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Covalent bonds
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Neutral ions
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Positive ions
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Negatively ions
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| 5. | Amalgam is the homogeneous mixture of ? | |
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Metal and metal
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Metal and mercury
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Metal and non-metal
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All of these
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| 6. | Purification of metals by liquation method is based on difference in ? | |
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solubility
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density
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vapour density
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melting point
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| 7. | Polymer used in making floor tiles is ? | |
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buta-1, 3-diene
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polypropylene
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polyyinyl chloride
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teflon
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| 8. | The best electrical conductor is ? | |
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gold
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aluminium
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silver
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copper
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| 9. | Iron is galvanized by coating it with ? | |
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manganese
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nickel
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zinc
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chromium
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| 10. | The metal liquid at room temperature is ? | |
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Sodium
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Copper
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Mercury
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Aluminium
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