Question

Which one of the following statements is true about catalysts?

A. They are required for a chemical reaction to take place.

B. They change the rate of a chemical reaction without being used up.

C. They change the rate of a chemical reaction but are always used up.

D. They can only slow down the rate of a chemical reaction.

Answer 1

@abb0t @Photon336 @Rushwr please help me.

Answer 2

Is it B?

Answer 3

yep

Answer 4

Thanks :)

Answer 5

A is wrong because u don't need a catalyst for each and every reaction to take place. There are reaction that don't need the help of a catalyst.
B is correct
C is wrong because they don't get used up during the reaction, there can be temporary transformation but at the end of the reaction u get the same amount of the catalyst.
D is wrong because Catalysts only increase the rate of the reaction.
But anti catalysts can slow the reaction. But not catalysts.

Answer 6

Thanks, I posted another question :)