Which of the following will not act as o...

Which of the following will not act as oxidising agents?

`CrO_(3)`

`MnO_(3)`

`WO_(3)`

`CrO_(4)^(3-)`

Text Solution

AI Generated Solution

The correct Answer is:

To determine which of the given compounds will not act as an oxidizing agent, we need to analyze the oxidation states of the elements involved and their tendencies to undergo reduction. Here’s a step-by-step solution: ### Step 1: Identify the Compounds The compounds given in the question are: 1. CrO3 (Chromium trioxide) 2. MnO3 (Manganese trioxide) 3. WO3 (Tungsten trioxide) 4. CrO4^3- (Chromate ion) ### Step 2: Determine the Oxidation States Next, we calculate the oxidation states of the central metal in each compound: - **CrO3**: Chromium (Cr) has an oxidation state of +6. - **MnO3**: Manganese (Mn) has an oxidation state of +6. - **WO3**: Tungsten (W) has an oxidation state of +6. - **CrO4^3-**: In the chromate ion, Chromium (Cr) has an oxidation state of +6. ### Step 3: Analyze the Oxidizing Ability An oxidizing agent is a substance that can gain electrons and be reduced. Generally, elements in higher oxidation states are better oxidizing agents because they can easily be reduced to lower oxidation states. However, heavier elements tend to be more stable in their higher oxidation states and do not reduce easily. ### Step 4: Compare the Elements - **Chromium (Cr)** and **Manganese (Mn)** are transition metals that can exist in multiple oxidation states and can be reduced. - **Tungsten (W)**, being a heavier element, prefers to remain in its higher oxidation state (+6) and is less likely to be reduced to a lower oxidation state. ### Step 5: Conclusion Since tungsten (W) in WO3 is less likely to act as an oxidizing agent due to its stability in the +6 oxidation state, it will not act as a good oxidizing agent compared to the others. Thus, the answer is: **WO3 (Tungsten trioxide) will not act as an oxidizing agent.**

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Which of the folloiwng will not act as oxidising agents ?

`CrO_(3)`

`MoO_(3)`

`WO_(3)`

`CrO_(4)^(2-)`

Which of the following ion acts as an oxidising agent?

`Eu^(2+)`

`Np^(4+)`

`Sm^(2+)`

`Yb^(2+)`

Which of the following cannot act as an oxidising agent ?

`S^(2-)`

`Br_(2)`

`HSO_(4)^(-)`

`SO_(3)^(2-)`