Examples of few compounds in a particular oxidation state are given. Mark the example which is not correct.

Mark the example which is not correctly matched ?

Mark the example which is not correctly matched ?

One word answers are givenn for the following, Mark the example which is not correct.

Give an example of compounds in which the oxidation state of nitrogen : 0.

Give an example of compounds in which the oxidation state of nitrogen : +5.

Give an example of compounds in which the oxidation state of nitrogen : -3 .

Give an example of compounds in which the oxidation state of nitrogen : +3 .

Give example of two compounds one in which the oxidation state of oxygen is +2 and the other in which it is -1.

Examples of few solids are given below. Find out the example which is not correctly matched.