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

(a) Na(s) + 2H2O(l) → 2NaOH(aq) + 2H2(g) 

(b) 2Na(s) + 2H2O(l) → 2NaOH(aq) +H2(g) 

(c) 2Na(s) + 2H2O(l) → NaOH(aq) + 2H2(g) 

(d) 2Na(s) + H2O(l) - 2NaOH(aq) + 2H2(g)

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Correct option is (b) 2Na(s) + 2H2O(l) → 2NaOH(aq) +H2(g)

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