Question

For the following question, enter the correct numerical value upto TWO decimal places. If the numerical value has more than two decimal places, round-off the value to TWO decimal places. (For example: Numeric value 5 will be written as 5.00 and 2.346 will be written as 2.35) The maximum oxidation state of osmium is \rule{2cm{0.15mm} ?}

Hint:

The maximum oxidation state of a transition metal is usually equal to its group number in the periodic table.

Answer 1

Correct Answer: 8

Step 1: Osmium (\( \mathrm{Os} \)) is a transition metal belonging to group 8 of the periodic table.
Step 2: Transition metals can exhibit oxidation states up to their group number.
Step 3: Osmium shows its highest oxidation state in compounds such as osmium tetroxide (\(\mathrm{OsO_4}\)).
Step 4: In \(\mathrm{OsO_4}\), oxygen has an oxidation state of \(-2\). \[ 4 \times (-2) = -8 \]
Step 5: To balance the charge, osmium must have an oxidation state of \(+8\).