Which of the following statements are true for pure substances?

  • (i) Pure substances contain only one kind of particle.
  • (ii) Pure substances may be compound or mixture.
  • (iii) Pure substances have the same composition throughout.
  • (iv) Pure substances can be exemplified by all elements other than nickel.

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Explanation:

Pure substances are composed of just one constituent having its composition throughout. They are not formed by mixing any other substance. Nickel is an example of a pure substance as it does not contain any other substance in it.

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