Question 3 — State with reason(s) whether the following - Questions at the end of the chapter - Chapter 4 Class 7 - The World of Metals and Non-metals (Curiosity)

Last updated at August 17, 2026 by

Q3 (Medium): State with reason(s) whether the following statements are True or False: (i) Aluminium and copper are examples of non-metals used for making utensils and statues. (ii) Metals form oxides when combined with oxygen, the solution of which turns blue litmus paper to red. (iii) Oxygen is a non-metal essential for respiration. (iv) Copper vessels are used for boiling water because they are good conductors of electricity.

Answer:
We have studied that metals and non-metals have different properties and uses . This is why we can identify true and false statements.

💡 Statement Analysis:

(i) False - Aluminium and copper are metals , not non-metals
(ii) False - Metal oxides are basic and turn red litmus blue
(iii) True - Oxygen is a non-metal needed for breathing
(iv) False - Copper vessels are used because they conduct heat well

Metals vs Non-metals Properties Property Metals Non-metals Examples Aluminium, Copper Oxygen, Sulphur Oxide nature Basic oxides Acidic oxides Heat conduction Good conductors Poor conductors Uses Utensils, statues Respiration, burning
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