NUTRITION
DIGESTIVE SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
What does a catalyst do?
|
|
A substances that speeds up chemical reactions
|
|
|
A thing that precipitates an event
|
|
|
Either A or B
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -Catalysts make this process more efficient by lowering the activation energy, which is the energy barrier that must be surmounted for a chemical reaction to occur. As a result, catalysts make it easier for atoms to break and form chemical bonds to produce new combinations and new substances.
Detailed explanation-2: -A catalyst is a substance which increases the rate of a chemical reaction but it is not used up (remains chemically unchanged at the end). It provides an alternative reaction pathway of lower activation energy.
Detailed explanation-3: -Catalysts help a reaction happen faster but do not change themselves during the reaction.
There is 1 question to complete.