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  • Which among the following elements are oxidised on reaction with dihydrogen ? A. Calcium B. Oxygen C. Lithium D. SulphurOption: 1<

Which among the following elements are oxidised on reaction with dihydrogen ?

A. Calcium
B. Oxygen
C. Lithium
D. Sulphur

Option: 1

A only
 


Option: 2

C only
 


Option: 3

A and C only
 


Option: 4

A, B and C only


Answers (1)

best_answer

Oxidation of an element means removal of an electron or increase in its oxidation state. When hydrogen reacts with Oxygen or Sulphur, it oxidises to \mathrm{H}^{+}\, ion and reduces them to \mathrm{O}^{2-} or  \mathrm{S}^{2-} ion.
But when hydrogen reacts with alkali metals or alkali earth metals, hydrogen reduces to hydride ion \left(\mathrm{H}^{-}\right) and oxidises them to their respective oxidation states. Hence, Calcium and Lithium shall oxidize on reaction with hydrogen.

Posted by

himanshu.meshram

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