“iran starts uranium enrichment program”
“north korea conducts underground atomic tests”
“pakistan accused of selling atomic secrets to
libya”
these headlines are most closely related to
united states national security concerns over the
(1) proliferation of nuclear weapons
(2) construction of nuclear power plants
(3) effectiveness of the nuclear test ban treaty
(4) enforcement of the strategic arms limitation
treaty
base your answer to question 47 on the passage
below and on your knowledge of social studies.
…capitalism, demonstrably the greatest of the
constructed economic systems, has in the past
decade clearly proved its advantages over the
alternative systems. the information highway
will magnify those advantages. it will allow those
who produce goods to see, a lot more efficiently
than ever before, what buyers want, and will
allow potential consumers to buy those goods
more efficiently. adam smith would be .
more important, consumers everywhere will
enjoy the benefits.
— bill gates, 1995

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.

b. examine and describe cells