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Railways PYQCBT 2 2017

RRB NTPC · Question 17

In science, which of the following is the property of a mixture?

  1. The constituents of a mixture retain their physical properties

  2. It have fixed melting and boiling point

  3. It cannot be separated by physical methods

  4. Its composition is fixed

Show answer & explanation

Answer: (A) The constituents of a mixture retain their physical properties

Explanation

In a mixture the substances are only physically mixed, so each constituent keeps its own properties. A mixture has variable composition, no fixed melting or boiling point, and can be separated by physical methods such as filtration or distillation.