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Delhi Police SI Classification of Elements and Periodicity — practice questions

Explore 1 free Classification of Elements and Periodicity questions in Delhi Police SI Science. Open each question or exercise to read its content, reference answers and available explanation.

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Classification of Elements and Periodicity questions and exercises with answers

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Which of the following can generally exist in solid, liquid and gaseous forms?Read the answer and worked solution →

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Which of the following can generally exist in solid, liquid and gaseous forms?

  1. Metalloids
  2. Non-metals
  3. Inert elements
  4. Metals
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Correct answer: B. Non-metals

1. Metals are almost all solids at room temperature (mercury being the exception). 2. Non-metals occur as solids (carbon), liquids (bromine) and gases (oxygen). 3. Hence non-metals exist in all three physical states. _Source: RRB Group D CEN-02/2018 PYQ, Q.65._

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