In which of the following chromium has different oxidation state?
Correct answer: B. CrCl3
- A. K2Cr2O7
- B. CrCl3
- C. CrO3
- D. K2CrO4
Explanation
i.Oxidation state in K2Cr2O7=2+2x+(-14)=0 =2x=12;x=6.ii.Oxidation state in CrCl3=x+(-3)=0 =x=3iii.Oxidation state in CrO3=x+(-6)=0 =x=6.There is no need to further find out the oxidation state of Cr in K2CrO4 because we already have a compound(CrCl3) having an odd oxidation state,so that is our answer.
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Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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