Class 8 Science Chapter 4: Materials: Metals and Non-Metals - NCERT Solutions

This page focuses on the complete NCERT solutions for Class 8 Science Chapter 4: Materials: Metals and Non-Metals. This section provides detailed, easy-to-understand solutions for all the questions from this chapter. These Materials: Metals and Non-Metals question answers will offer you valuable insights and explanations.

  • Metals are good conductor of electricity and heat whereas non- metals are poor conductor of electricity and heat.
  • Metals are lustrous whereas non- metals are not lustrous.
  • Malleability is the property of metals by which metals can be drawn into thin sheets. Non- metals does not shows malleability.
  • Ductility is the property of metals by which they can be drawn into wires. Non- metals does not show the ductility. Hence, they are not ductile.
  • In the presence of air, metal forms metal oxide to react with the oxygen.
  • Metal oxides are basic in nature whereas non- metallic oxides are acidic in nature.
  • On reacting with water, metal produce metal hydroxides and hydrogen gas.
  • Non- metals does not react with water.
  • On reaching with acids, metals produce metal salt and hydrogen gas whereas non- metals do not reacts with acids.
  • Metal produces hydrogen gas on reacting with the base.
  • Atoms are the smallest unit which cannot be divided into the smaller one.
  • The materials or substances through which heat and electricity can pass easily are called as conductor. Metals are good conductor of electricity whereas non- metals are poor conductor.
  • The reaction in which a higher reactive element displace the less reactive element from its place, then the reaction is called as displacement reaction.
  • Substances which cannot be broken down into simpler substances are called as elements.
  • Hardness is defined as the rigidity of the substance, by which the substance cannot be broken down easily.
  • The elements which shows the properties of both metal and non- metals are known as metalloids.
  • The property of metal due to which it produces ringing sound. It is called as sonorous.

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Exercise 1 ( Page No. : 55 )

Key Features of NCERT Class 8 Science Chapter 'Materials: Metals and Non-Metals' question answers :

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