Podcast
Questions and Answers
Which physical property of metals makes gallium and caesium exceptions to the general rule that metals exist as solids at room temperature?
Which physical property of metals makes gallium and caesium exceptions to the general rule that metals exist as solids at room temperature?
- High density
- High melting point
- Low melting point (correct)
- Brittle texture
What will be the action of sodium (Na) on water?
What will be the action of sodium (Na) on water?
- It will have no reaction with water.
- It will form a layer of oxide on the surface.
- It will react violently, producing hydrogen gas and sodium hydroxide. (correct)
- It will produce only hydrogen gas.
Which allotrope of carbon is a conductor of electricity, contrary to the typical property of non-metals?
Which allotrope of carbon is a conductor of electricity, contrary to the typical property of non-metals?
- Graphite (correct)
- Diamond
- Buckminsterfullerene
- Fullerene
Why are platinum, gold, and silver used to make jewellery?
Why are platinum, gold, and silver used to make jewellery?
What unique property of iodine makes it stand out as a non-metal despite its lustrous appearance?
What unique property of iodine makes it stand out as a non-metal despite its lustrous appearance?
What type of oxides are formed when non-metals combine with oxygen?
What type of oxides are formed when non-metals combine with oxygen?
What property allows alkali metals like lithium, sodium, and potassium to be cut with a knife?
What property allows alkali metals like lithium, sodium, and potassium to be cut with a knife?
Why are sodium, potassium, and lithium stored under oil?
Why are sodium, potassium, and lithium stored under oil?
In the reactivity series of metals, which metal would react the most vigorously with water?
In the reactivity series of metals, which metal would react the most vigorously with water?
Why is aluminium used to make utensils for cooking despite being a highly reactive metal?
Why is aluminium used to make utensils for cooking despite being a highly reactive metal?
Which type of metal oxide layer protects the underlying metal from further corrosion?
Which type of metal oxide layer protects the underlying metal from further corrosion?
Why are carbonate and sulphide ores usually converted into oxides during the extraction process?
Why are carbonate and sulphide ores usually converted into oxides during the extraction process?
Which property of metals is described as having a shining surface?
Which property of metals is described as having a shining surface?
What is the purpose of holding a piece of sodium metal with tongs and drying it before cutting it with a knife?
What is the purpose of holding a piece of sodium metal with tongs and drying it before cutting it with a knife?
Which metal would be the easiest to cut with a sharp knife based on the activity described?
Which metal would be the easiest to cut with a sharp knife based on the activity described?
Which process involves rubbing metal samples with sandpaper to observe changes in appearance?
Which process involves rubbing metal samples with sandpaper to observe changes in appearance?
Which metal is placed higher in the reactivity series than sodium?
Which metal is placed higher in the reactivity series than sodium?
'Ductility' is a property of metals that refers to their ability to:
'Ductility' is a property of metals that refers to their ability to:
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