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A. | initiates a chemical reaction and is a catalyst by itself. [Wrong Answer] |
B. | atlers the position of equilibrium in a reversible reaction. [Wrong Answer] |
C. | increases the number of active centres by increasing the unevenness of catalyst surface and by creating discontinuities in the crystals. [Correct Answer] |
D. | all (a), (b) and (c). [Wrong Answer] |