Multiple choice The oxidation state of central metal atom in ‘Lunar caustic’ is 1 2 3 5 2 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Silver nitrate (AgNO3) is known as Lunar caustic. The central metal in silver nitrate is nitrogen atom. 1 + x + 3(- 2) = 0 x - 5 = 0 x = + 5 Hence, the oxidation state of N atom in silver nitrate is + 5. Only option (5) is correct.