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CBSE Class 10 Science Question 4 of 60

Solved 2022 Term 1 Question Paper CBSE Class 10 Science — Question 4

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Question 4

Sodium reacts with water to form sodium hydroxide and hydrogen gas. The balanced equation which represents the above reaction is

  1. Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + 2H2(g)
  2. 2Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + H2(g)
  3. 2Na(s) + 2H2O(l) ⟶ NaOH(aq) + 2H2(g)
  4. 2Na(s) + H2O(l) ⟶ 2NaOH(aq) + 2H2(g)
Answer

2Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + H2(g)

Reason — The balanced equation for the reaction between sodium and water to form sodium hydroxide and hydrogen gas is:

2Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + H2(g)