Chemistry · PYQ NEET UG 2020
हिन्दी Identify the INCORRECT statement.
- The transition metals and their compounds are known for their catalytic activity due to their ability to adopt multiple oxidation states and to form complexes.
- Interstitial compounds are those that are formed when small atoms like H, C or N are trapped inside the crystal lattices of metals.
- The oxidation sates of chromium in \( \mathrm{CrO_4^{2-}} \) and \( \mathrm{Cr_2O_7^{2-}} \) are not the same.
- \( \mathrm{Cr^{2+}(d^4)} \) is a stronger reducing agent than \( \mathrm{Fe^{2+}(d^6)} \) in water.
Correct answer · Option 3
The oxidation sates of chromium in \( \mathrm{CrO_4^{2-}} \) and \( \mathrm{Cr_2O_7^{2-}} \) are not the same.
Explanation
In both \( \mathrm{CrO_4^{2-}} \) and \( \mathrm{Cr_2O_7^{2-}} \), the oxidation state of chromium is +6. Thus, statement 3 is incorrect.
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