Chemical Reaction Engineering
A catalyst loses its activity due to

Loss in surface area of the active component
Covering of the catalytic active sites by a foregin substance
Agglomeration of metal particles caused by thermal sintering of the solid surface
All of these

ANSWER DOWNLOAD EXAMIANS APP

Chemical Reaction Engineering
The reactions of high molecularity are rare, because

Of requirement of very large concentration for such reactions
Of low probability of many body collisions
Many body collisions are not favoured energetically
Of very large activation energy of many bodies

ANSWER DOWNLOAD EXAMIANS APP