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A positive catalyst is a catalyst which speeds up the rate of a chemical reaction by lowering its activation energy. A negative catalysts slows the rate of a chemical reaction or makes it less likely to occur.
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What is the difference between positive catalyst and negative catalyst?
The substances which increase the rate of a chemical reaction are called a Positive Catalyst whereas The substances which decrease the rate of a chemical reaction are called Negative Catalyst. Positive Catalyst decreases the Activation energy of reactant molecules whereas negative catalyst increases the Activation energy of the reactant molecules. Positive Catalyst is also called the Promoter whereas negative catalyst is also called Inhibitor.
When a catalyst is added to a reaction?
There are positive catalysts used when the reaction rate is needed to be faster or the negative catalysts to make the reaction rate slower.
Differentiate between the terms reversed polarity and normal polarity?
Normal polarity is for the power to normally go from positive to negative, reverse polartity is to change the positive to a negative and the negative to a positive so the power goes the other way.
Is staphylococcus aureus positive for gelatin?
Yes it is. This test can be used to differentiate between S. aureus (which is positive) and S. epidermidis (which is negative).
What are main functions of catalysts?
Catalyst is the agent which alter the rate of chemical reactions. Catalyst are not consumed by the reaction as the other reactants. Those catalyst which increase or speed up the reaction are known as positive catalyst. Those who slow the reaction are known as negative catalyst.
Differentiate between anode ray and cathode ray?
Anode ray is positive and cathode ray is negative
How could you differentiate between e coli and staph epidermidis using a simple stain?
E.coli is a gram negative rod mostly isolated from urine while staph is a gram positive cocci. You can differentiate them by color. E. Coli is Pink which is negative while Staph is Purple with is positive.
How do you differentiate urobilinogen and porphobilinogen?
Watson-Schwartz test negative : urobilinogen Watson-Schwartz test positive : porphobilinogen
Why is it important to include both gram negative and gram negative organisms in a smear prep when you are performing the gram stain?
The point of the gram stain is to differentiate between two things, with out both positive and negative gram cells there would be nothing to differentiate between, defeating the purpose of the process.
Is a positive plus a negative make a positive or a negative?
Positive + Negative = Negative Negative + Negative = Positive Positive + Positive = Positive Negative + Positive = Negative
What is a negative - positive?
Negative * positive = negative Positive * positive = positive Negative * negative = positive
What does a catalyst do in a chemical reaction?
Reduces the activation energy of the reaction, which speeds up the progress of the reaction It increases the rate of a chemical reaction. However a true catalyst is not consumed in the reaction.
