Electronic Configuration and Oxidation States

Q. What is the minimum and maximum oxidation number of chromium

Q. 2.The oxidation number of nitrogen and carbon in NOClO4.

Q. 4.Oxidation number of phosphorus in H3po4

Q. Which one of the following oxides exhibits paramagnetic behaviour?

1. $C{O}_2$
2. $S{O}_2$
3. $Cl{O}_2$
4. $Si{O}_2$

Q. If the electrons in chromium $\left(Cr\right)$ have $m_l=+1$ and $m_s=-\frac{1}{2}$, then:

1. The minimum number of such electrons is 3
2. The minimum number of such electrons is 2
3. The maximum number of such electrons is 3
4. The maximum number of such electrons is 4

Q. 77 An element A reacts with water to form compound B which is used in white washing. The compound B on heating, forms an oxide C, which in treatment, gives back B. Identify A, B and C and give the chemical reactions involved.

Q. Which of the following are appropriate oxidation states exhibited by the elements belonging to the group 15 family?

1. 3
2. -3
3. 5
4. All of these

Q.

The oxidation number of cobalt in K[Co(CO₄)]?

Q. 28.Oxidation no of Nitrogen in H-N (=also one dative bond) C