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