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Catalysis: homogeneous, heterogeneous, enzyme catalysis
JEE Main level
Single correct option
Difficulty 2 of 3
sc078
Zeolites act as shape-selective catalysts because
A
they dissolve in the reaction mixture and act as homogeneous catalysts
B
their honeycomb-like structure has pores of molecular dimensions, so only molecules of suitable size can enter, react and leave
C
they have very high thermal conductivity
D
they are proteins with a specific active site
Answer: B
Zeolites are aluminosilicates with a network of uniform pores. Reactant and product selectivity depends on whether molecules fit in these pores.
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