When sodium is heated in moist air, the ultimate product obtained is:
A
Na2O
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B
NaOH
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C
Na2CO3
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D
Na2O2
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Solution
The correct option is CNa2CO3 When sodium is heated with moist air, the ultimate product obtained is Na2CO3. In moist air, a layer of sodium oxide, hydroxide and carbonate is formed on its surface due to which, it loses its lustre.
The complete reaction sequence is as follows: 4Na+O2→2Na2O2H2O−−−→4NaOH2CO2−−−→2Na2CO3+2H2O