List of top Science Questions on Chemical Properties Of Metals

Give reasons why copper is used to make hot water tanks and not steel (an alloy of iron).
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset but after a futile argument the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
Differentiate between metal and non-metal on the basis of their chemical properties.
You must have seen tarnished copper vessels being cleaned with lemon or tamarind juice. Explain why these sour substances are effective in cleaning the vessels.
Give reasons:
  1. Platinum, gold and silver are used to make jewellery.
  2. Sodium, potassium and lithium are stored under oil.
  3. Aluminium is a highly reactive metal, yet it is used to makeutensils for cooking.
  4. Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
What type of oxides are formed when non-metals combine with oxygen?
Name two metals which will displace hydrogen from dilute acids, and two metals which will not.
What are amphoteric oxides? Give two examples of amphoteric oxides.
Food cans are coated with tin and not with zinc because
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
Which of the following methods is suitable for preventing an iron frying pan from rusting?
Which of the following pairs will give displacement reactions?