Describe how light changes with depth in the ocean.

The ocean is differentiated into three zones on the basis of the light level and depth. The upper 656 feet or 200 meters of the ocean is known as the sunlight zone or euphotic zone. Only a small concentration of light passes beyond this depth. The zone in between the 200 and 1000 meters is generally considered as the twilight zone or the dysphotic zone. In this zone, the light intensity briskly disintegrates with the increase in depth. The midnight or the aphotic zone prevails in the depths below 1000 meters. The sunlight does not pass through these depths and the zone is completely covered in darkness.

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form() .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

the answer is c

tell me if wrong