Why glycerin is called negative catalyst

1.	Why glycerin is called negative catalyst
Answer» Platinum black as a\xa0catalyst\xa0accelerates the combination of hydrogen and oxygen to form water. Similarly, the\xa0catalyst\xa0that decreases the rate of reaction is\xa0known\xa0as\xa0negative catalyst\xa0or inhibitor and the process is\xa0known\xa0as\xa0negative catalysis\xa0or inhibition. ... Here\xa0glycerol\xa0acts as\xa0negative catalyst.

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