5. Which of the following reactions shows the reducing property of hydrogen?
(a) CuO+H2➡️Cu +H2O
(b) 2Na+ H2➡️2NaH
(c) CO + 2H2➡️CH3 OH
(d) Mg + 2HCl ➡️ MgCl2 + H2
Answers
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a) CuO + H2 - Cu + H2O
Explanation:
As the oxidation state of copper decreases from +2 to 0 and decrease in oxidation number is considered as reduction .
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Answer:
b. 2Na+H2 2N
giving of hydrogen is refusing agent
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