Assertion: Oxidation state of hydrogen is +1 in H2O while -1 in CaH2. Reason: CaH2 is a metal hydride and for hydrides, hydrogen is assigned the oxidation number of -1.

Question

Assertion: Oxidation state of hydrogen is +1 in H2O while -1 in CaH2. Reason: CaH2 is a metal hydride and for hydrides, hydrogen is assigned the oxidation number of -1. (A) If both assertion and reason are true and reason is the correct explanation of assertion (B) If both assertion and reason are true but reason is not the correct explanation of assertion (C) If assertion is true but reason is false (D) If both assertion and reason are false

Tardigrade Admin · Accepted Answer

Oxidation number of elements in their compounds or ions is obtained using some rules e.g., hydrogen is assigned oxidation number of +1 in general and -1 for metal hydrides.

Q. Assertion : Oxidation state of hydrogen is +1 in H2​O while -1 in CaH2​. Reason : CaH2​ is a metal hydride and for hydrides, hydrogen is assigned the oxidation number of -1.

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

Oxidation number of elements in their compounds or ions is obtained using some rules e.g., hydrogen is assigned oxidation number of +1 in general and -1 for metal hydrides.

Q. Assertion : Oxidation state of hydrogen is +1 in $H_{2} O$ while -1 in $C a H_{2}$ .
Reason : $C a H_{2}$ is a metal hydride and for hydrides, hydrogen is assigned the oxidation number of -1.