Q. Which of the following is/are correct about alloy?
1.Alloys are mixtures of two or more metals or a metal and a non-metal.
2.Alloys can be separated into their components by physical methods.
3.Brass is a mixture of approximately 30% zinc and 70% copper.
Choose the correct answer from below given codes:

[A] 1 only

[B] 1 and 2 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: C
Notes:

Explanation: Alloys are mixtures of two or more metals or a metal and a non-metal and cannot be separated into their components by physical methods.

  • But still, an alloy is considered as a mixture because it shows the properties of its constituents and can have variable composition.
  • For example, brass is a mixture of approximately 30% zinc and 70% copper.

Source: Science NCERT 9th Class