1 and 2 are OK. 3 is wrong. Kr is a noble gas and is not in the column with the halogens (F, Cl, Br, I). Look on the periodic table and find the element listed in the choices there to see which is in the halogen column. 4 is OK. 5 and 6 are OK. 7 there is no picture. 8 is wrong. You have 60 g reactants so you must have 60 g products. The problems tells you H2O is 18 of that so 60-18 = ? must be the other one. 9 I think is correct IF you leave the egg in the shell (meaning to boil it) but think D is a better answer and probably the one expected by the author of the problem. 10 is correct BUT note that no reaction takes place so you have the atoms of Br2 present before and after. 11 is wrong. I see the Na is balanced, the C is balanced which leaves just H and O that are not balanced. For the answer choices I see only one that has both H and O so I would use that. 12. I answered this for another student but I don't have that link. If you will go to Google and type in something like ball and stick model for PCl3 you should find some good pictures. 13 leaves me perplexed. I don't think there is a good answer because I had trouble finding what the problem was all about. I THINK, but I don't know, the author meant for this problem to be a teaching point in which Cu would be the limiting reagent in one part and S would be the limiting reagent in the other part. That's not the way it works out so the only conclusion I could draw was that using more Cu produced more Cu2S. But that's an obvious conclusion anyway. Personally, I think the author of the problem made a miscalculation and stated the problem in a way that wasn't intended.
Hope this helps. Good luck.