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NDA 1 2024 GAT, question 106

Topic: Chemistry

Q106

Which among the following is the correct composition of Borax ?

  1. (a) Sodium, Boron, Magnesium and Hydrogen
  2. (b) Sodium, Boron, Oxygen and HydrogenCorrect answer
  3. (c) Potassium, Boron, Oxygen and Hydrogen
  4. (d) Sodium, Boron, Nitrogen and Hydrogen

Solution.

Answer: (b) Sodium, Boron, Oxygen and Hydrogen

  1. Common borax is sodium tetraborate decahydrate, Na₂B₄O₇·10H₂O.
  2. Its elements are sodium, boron, oxygen and hydrogen, matching (b).