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RRB Paramedical Salts and Hydrates — practice questions

Explore 1 free Salts and Hydrates questions in RRB Paramedical Science. Open each question or exercise to read its content, reference answers and available explanation.

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Salts and Hydrates questions and exercises with answers

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How many water molecules of crystallisation are present in one molecule of washing soda?Read the answer and worked solution →

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How many water molecules of crystallisation are present in one molecule of washing soda?

  1. Eight
  2. Five
  3. Ten
  4. Seven
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Correct answer: C. Ten

1. Washing soda is hydrated sodium carbonate. 2. Its formula is Na2CO3 . 10H2O. 3. Therefore it contains 10 water molecules of crystallisation. _Source: RRB Group D CEN-02/2018 PYQ, Q.17._

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