NEET2026ChemistryChapterActual
What are the respective oxidation states of the underlined atoms in O F₂ , Li H , and K₂ Cr ₂O₇ ?
Options
- A-2, +1, and +6
- B+2, -1, and +6
- C+2, +1, and +7
- D-1, -1, and +6
Correct answer
B. +2, -1, and +6
Step-by-step solution
In OF₂ , fluorine is more electronegative than oxygen and has an oxidation state of -1 . Let the oxidation state of oxygen be x . x + 2(-1) = 0 x = +2 In LiH , lithium is an alkali metal with an oxidation state of +1 . Let the oxidation state of hydrogen be y . +1 + y = 0 y = -1 In K₂Cr₂O₇ , potassium has an oxidation state of +1 and oxygen has an oxidation state of -2 . Let the oxidation state of chromium be z . 2(+1) + 2z + 7(-2) = 0 2 + 2z - 14 = 0 2z = 12 z = +6 The respective oxidation states are +2 , -1 , and