Metals and Non - metals
Give reasons.
(a) Platinum, gold and silver are used to make jewellery.
(b) Sodium, potassium and lithium are stored under oil.
(c) Aluminium is a highly reactive metal, yet it is used to make utensils for cooking.
(d) Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
Metals and Non - metals
Which of the following property is generally not shown by metals (except some metals)?
Metals and Non - metals
In Fig you find that the bulb glows when an iron nail is placed between two ends of wire. Complete the following sentences on the bases of this fact.
__________is a metal.
Metals are good_________ of electricity.
Metals and Non - metals
Give reasons:
NaCl is not a conductor of electricity in solid state whereas is does conduct electricity in aqueous solution as well as in molten state.
Metals and Non - metals
____________ is the metal existing in liquid form at ordinary temperatures.
Metals and Non - metals
Which of the following metal does not conduct electricity?
Metals and Non - metals
Ornaments are usually made up of ____________ gold.
Metals and Non - metals
Which is the best conductor of electricity?
Metals and Non - metals
Which of the following is a property of non-metals?
Metals and Non - metals
An element that is relatively strong is relatively: