| (1) A? (2) ②, ③, ⑤, ④ |
| (1) the use of hydrogen peroxide solution and manganese dioxide to produce oxygen, do not need to be heated, belongs to the solid-liquid ambient temperature type, so the choice of generating device A; (2) with concentrated sulfuric acid as a desiccant, the gas enters from the long conduit, the short conduit out, the density of oxygen is greater than air, so it should be from the long tube into the gas, the short tube to exhaust the air; Therefore, the answer is: (1) A;? (2) ② ③ ⑤ ④; |