Case Study #1: Poppy was a senior in high school when she began to worry her parents and friends. Poppy was moody and sensitive. When she entered her sophomore year, she dyed her hair black and started wearing black eye makeup and black clothing. She rarely spoke at home. She would come home from school and hide out in her room. She avoided meals with her family and she was always brooding. Whenever anyone showed concern for her well-being she got angry and pushed them away. One evening, she ran into her mom’s room screaming that she was afraid she was going to die. Blood was pouring from her right arm. Her mother took her directly to the ER - where her mother discovered this was not the first time she had been cutting. Under her long sleeves and long pants, her arms and legs were covered with scars and cuts. Poppy was discovered to be heavy into drugs and drinking and had very few friends. Symptoms: Diagnosis:

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.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

so she was walking and she stepped on warm jeffy , uh uh uhh dadye i just pooped my pants