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Question

Name the product formed when sodium react with water.
  1. NaH
  2. NaOH
  3. Na2O
  4. No reaction take place


Solution

The correct option is B NaOH
Alkali metals react with water to form
hydroxide and dihydrogen
2Na(s)+2H2O(l)NaOH(aq)+H2(g)

Theory 
Reactivity towards water:
Alkali metals react with water to form hydroxide and dihydrogen

2M(s)+2H2O(l)2MOH(aq)+H2(g)
M = alkali metal 
Note:- 
Lithium has the most negative Eo   value
But its reaction with water is less vigorous than that of sodium which has the least
negative Eo  value among the alkali metals 

Other metals of the group react explosively with water.They also react with proton donors such as alcohols, gaseous ammonia and alkynes. 

 

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