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The element which shows both positive & ...

The element which shows both positive & negative oxidation state is :

A

`Li`

B

`Mg`

C

`He`

D

`H`

Text Solution

AI Generated Solution

The correct Answer is:
To determine the element that shows both positive and negative oxidation states, we can follow these steps: ### Step 1: Understand Oxidation States - Oxidation state refers to the degree of oxidation of an atom in a compound. It can be positive or negative based on the gain or loss of electrons. ### Step 2: Analyze the Options - The question provides four options, which are likely to include metals and non-metals. Metals typically exhibit positive oxidation states due to their tendency to lose electrons. ### Step 3: Identify Metals and Non-Metals - Metals: Generally, they show only positive oxidation states. - Non-Metals: They can show both positive and negative oxidation states. ### Step 4: Focus on Hydrogen - Among the options, hydrogen is unique because it can exhibit both positive and negative oxidation states. - **Positive Oxidation State**: When hydrogen is bonded to non-metals (e.g., in HCl, where it has an oxidation state of +1). - **Negative Oxidation State**: When hydrogen is bonded to metals (e.g., in NaH, where it has an oxidation state of -1). ### Step 5: Conclusion - Based on the analysis, the element that shows both positive and negative oxidation states is hydrogen. ### Final Answer The correct answer is **Hydrogen**. ---
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