Which of the Following Statements Is/are True of Catalyst

question 75

Multiple Choice

Which of the following statements is/are true of catalyst?
1. A catalyst is a substance that speeds up a reaction without being consumed itself.
2. A heterogeneous catalyst is one that is present in the same phase (physical state) as the reacting molecules.
3. A homogeneous catalyst is one that is present in a different phase (physical state) from the reacting molecules.

• A) ​1 only
• B) ​2 only
• C) ​3 only
• D) ​1 and 2
• E) ​2 and 3

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