Chemistry Q61 – JEE-MAIN 2025

Home Chemistry d- & f-Block ElementsQuestion #371

Given below are two statements: Statement I :

C r O_{3}

is a stronger oxidizing agent than

M o O_{3}

Statement II :

C r (V I)

is more stable than

M o (V I)

In the light of the above statements, choose the correct answer from the options given below

Clue 1 of 3: Group Trends in d-Block Elements

Consider the general trends in stability of oxidation states and oxidizing power as you move down a group in the transition metals.

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Step 1: Analyze the trend of oxidizing power in Group 6 elements.✦ Active

In d-block elements, as we move down a group, the stability of higher oxidation states generally increases. Consequently, the oxidizing power of the higher oxidation states decreases down the group. Chromium ( $C r$ ) is above Molybdenum ( $M o$ ) in Group 6. Therefore, $C r (V I)$ compounds are stronger oxidizing agents than $M o (V I)$ compounds. Thus, Statement I ( $C r O_{3}$ is a stronger oxidizing agent than $M o O_{3}$ ) is TRUE.

Step 2: Analyze the trend of stability of higher oxidation states in Group 6 elements.○ Expand

As established, the stability of higher oxidation states increases down the group for d-block elements. This means $M o (V I)$ is more stable than $C r (V I)$ . Thus, Statement II ( $C r (V I)$ is more stable than $M o (V I)$ ) is FALSE.

Step 3: Combine the conclusions for both statements.○ Expand

Statement I is true, and Statement II is false. This corresponds to option 3.

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Chemistry Question 61 – JEE-MAIN 2025

Clue 1 of 3: Group Trends in d-Block Elements

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