Lakhmir Singh Solutions Class 10 Chemistry Solutions for Exercise in Chapter 3 - Chapter 3 Metals and Non Metals

Question 80 Exercise

(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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