CSEC Chemistry · May/June 2011 · Paper 1 · Question Q32
Which of the following statements BEST characterises a catalyst?
- (A)It alters the quantity of the products formed.
- (B)It is always unchanged chemically at the end of a reaction.
- (C)It is always unchanged physically at the end of a reaction.
- (D)It is always used up in a chemical reaction.
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