Which of the following is necessary to increase the rate of a reaction? a. a decrease in the frequency of collisions b. an increase in the frequency of collisions c. a decrease in the frequency of successful collisions d. an increase in the frequency of successful collisions

To increase the rate of a reaction, D. an increase in the frequency of successful collisions is necessary. As the collision that are successful, that is molecules collide with energy that is sufficient to break a chemical bond or that collide with proper orientation that can only increase the rate of the reaction.

So the answer is  D. an increase in the frequency of successful collisions is necessary

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.

c.

explanation: