EVERYDAY SCIENCE

Detailed explanation-1: -Decreasing the temperature of the reactants causes the molecules to move slower which creates low energy collisions and decreases the rate of the chemical reaction.

Detailed explanation-2: -Physical state of reactants. Powders react faster than blocks-greater surface area and since the reaction occurs at the surface we get a faster rate. The presence (and concentration/physical form) of a catalyst (or inhibitor). A catalyst speeds up a reaction, an inhibitor slows it down.

Detailed explanation-3: -These are called negative catalysts. Negative catalysts are frequently added to drugstore hydrogen peroxide to slow down its decomposition. So, what name is given to a catalyst that can slow down a chemical reaction? The answer is (B) negative catalyst.

Detailed explanation-4: -It is important to note that a few reactant particles do have enough energy to collide and initiate a reaction without the use of a catalyst. However their numbers are so low that a reaction can not be sustained. In the absence of a catalyst the reaction is too slow.

Detailed explanation-5: -Inhibitor is a common term for enzymes in biochemistry. The inhibitors can stop or slow down a process that is catalyzed by an enzyme (biological catalyst). The inhibition of the chemical reaction (action by the inhibitor) will slow down the process or stop the chemical reaction.