Chemistry-
General
Easy

Question

Which of the following reaction produces hydrogen

  1. M g plus H subscript 2 end subscript O    
  2. B a O subscript 2 end subscript plus H C l    
  3.  H subscript 2 end subscript S subscript 4 end subscript O subscript 8 end subscript plus H subscript 2 end subscript O    
  4. N a subscript 2 end subscript O subscript 2 end subscript plus 2 H C l    

The correct answer is: M g plus H subscript 2 end subscript O


    M g plus 2 H subscript 2 end subscript O rightwards arrow M g left parenthesis O H right parenthesis subscript 2 end subscript plus H subscript 2 end subscript upwards arrow

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