Chemistry
carbon dioxide is considered a molecule.
a. ring
b. bent
c. linear
d. tetrahedral
how many double bonds are in an alkane?
a. none
b. one
c. two
d. number varies
an alkane has five carbons; what is its name?
a. methane
b. propane
c. pentane
d. hexane
what is the term for hydrocarbons with at least one double bond?
a. alkane
b. alkene
c. alkyne
d. cycloalkane
molecules made of carbon found in living organisms are
a. ionic compounds
b. organic compounds
c. nuclear compounds
d. covalent compounds
a hydrocarbon with double or triple bonds is classified as
a. an alkane
b. saturated
c. unsaturated
d. a cycloalkane
the molecule cyclopentane is considered to be a(n)
a. alkene
b. alkyne
c. cycloalkane
d. cycloalkene
a polymer that does not melt when heated is classified as
a. natural.
b. synthetic.
c. thermoplastic.
d. thermosetting.

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.