Lakhmir Singh Solutions Class 10 Chemistry Solutions for Exercise in Chapter 3 - Chapter 3 Metals and Non Metals
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(a) Define non-metals. Give five examples of non-metals.
(b) Name a non-metal which conducts electricity.
(c) Name a non-metal having lustre (shining surface).
(d) Name a non-metal which is extremely hard.
(e) How do non-metals react with oxygen? Explain with an example. Give equation of the reaction involved. What is the nature of the product formed ? How will you demonstrate it?
(a) Non-metals are those which have poor conduction of electricity and they are neither malleable nor ductile
Examples: Carbon, Sulphur, Phosphorus, Silicon and oxygen.
(b) Carbon conducts electricity.
(c) Iodine has shining lustre.
(d) Carbon allotrope diamond is hard.
(e) Non-metals react with oxygen to form acidic oxides or neutral oxides. Carbon burns in air to form carbon dioxide.
C(s) + O2(g) → CO2(g)
Product formed is acidic. When carbon dissolves in water, it forms carbonic acid and turns blue litmus to red.
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