I think it looks good but some grammars are wrong i suggest trying to put it on grammarly and just check it out its just my suggestion and not doing this for points so you can delete this if it doesnt help
Ok the ML (the 3rd number) is not legit because the ML value can only be from -L to L (the second value)
Yes it is option D
simply if 1 mole of H2SO4 require 2 moles of NaCN, i.e. the double amount. so 3.6 moles will require 7.2 moles of NaCN
Not sure about the first two but I think number three is B. sorry if I'm wrong