Consider the following statements:(A) The highest oxidation state of Group 3 elements is more readily shown in their oxides than in fluorides(B) Fe can exist in $-2$ formal oxidation state also(C) Mn, Tc and Re easily form M(II) compoundsThe correct statement(s) is/are
(a)A and B
(b)A and C
(c)B and C
(d)C only
Answer
Answer: A ✓ checked by 4AB · confidence low
Explanation
Fe reaches −2 in [Fe(CO)₄]²⁻. Mn(II) is common, but Tc(II) and Re(II) are rare, so (C) is false. The chapter key gives A and B (a).