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1. |
How can we increase the ageing of alumina-silica catalyst? |
A. | By making the contact of catalyst with heavy metals |
B. | By making the contact of catalyst with lighter metals |
C. | By making the contact of catalyst with heavy non-metals |
D. | By making the contact of catalyst with lighter non-metals |
Answer» C. By making the contact of catalyst with heavy non-metals | |