Among Group 16 elements, which one does NOT show -2 oxidation state?
Option 4: Po
Explanation:
Group 16 elements (chalcogens) include oxygen (O), sulfur (S), selenium (Se), tellurium (Te), and polonium (Po). They generally exhibit oxidation states of -2, +2, +4, and +6. However, polonium (Po) is a radioactive metal and tends to form metallic bonds. It is less electronegative than the other elements in the group. Due to its metallic character, the -2 oxidation state is less stable and less common for polonium. Polonium more readily exhibits positive oxidation states.
Oxygen, selenium, and tellurium readily form compounds with a -2 oxidation state.
List I | List II | ||
A | Down’s syndrome | I | 11th chormosome |
B | α-Thalassemia | II | ‘X’ chromosome |
C | β-Thalassemia | III | 21st chromosome |
D | Klinefelter’s syndrome | IV | 16th chromosome |
The velocity (v) - time (t) plot of the motion of a body is shown below :
The acceleration (a) - time(t) graph that best suits this motion is :