The matter that CANNOT be broken down by chemical reactions into simpler substances is known as-

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RRB JE CBT I - (Held On: 2 June 2019 Shift 1)
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  1. Elements
  2. Compounds
  3. Mixtures
  4. Pure substances

Answer (Detailed Solution Below)

Option 1 : Elements
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Detailed Solution

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The correct answer is Elements

Key Points

  • An element is a substance that cannot be broken down into simpler substances by chemical reactions.
  • Elements are pure substances consisting of only one type of atom.
  • Examples of elements include hydrogen, oxygen, and carbon.
  • Elements are the building blocks for all other substances in chemistry, forming compounds and mixtures.
  • Each element is unique and is listed in the Periodic Table.

Additional Information

  • Compounds are substances formed from two or more elements chemically combined in fixed proportions.
  • Mixtures are combinations of two or more substances that are not chemically bonded and can be separated by physical means.
  • Pure substances can be either elements or compounds with a uniform and definite composition.
  • The concept of elements is fundamental to understanding chemical reactions and properties of matter.

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