Recessive traits are not supposed to show up in all generations. If X linked recessive were the answer, it is based on the chance factor of all the mothers being carriers. In that case, from first to second generation, there is a 50% chance , both the girls are carriers. One does not mate and the other mates to have two healthy children of both the sexes. This is dependent on high chance possibilities. Also, the affected boys of the second generation have no contribution whatsoever in making boys of third generation affected had it been x linked recessive. Therefore, the inheritance is from the mother to son and not a family or pedigree inheritance. Also, there is no evidence of the case not being Y linked. So, it should be only Y Linked.
49. The sum is there in Octave levenspiel PG 47 where the unit of k is in moles/l/min leading to the answer being 100. But since this question had a different unit of k and properly mentioned that the answer be specified in mins and not min/l , it should be multiplied with the volume of the reactor, I.e. 100l, making the answer to be 10000 mins.
These are my arguments. And, please report if you can include them while challenging the questions. I do not have a problem in paying a share of it. But personally, I am in a family trouble and would like to avoid the hassle as of now. This is a sincere request. Please respond. Thank you.