See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

    3 3 4 2 N H N O     O S O O S S S O O O   5      3 5 4 3 N H N O     O S S O O have difference of oxidation states greater than 2. Total compounds 4 P     0   5   0   6  2      2 2 Hydrazine NH NH Both nitrogen have same oxidation state of 2           Calcium cyanamide CaNCN Both nitrogen have same oxidation state of 3           2 2 Urea NH CONH Both nitrogen have same oxidation state of 3       2 2 7 Cr O both chromium have same oxidation state 6       P O H S O O S OH O   5    3  P Q 4 4 16     