题型:单选题 题类:常考题 难易度:容易
试管号 | 1 | 2 | 3 | 4 | 5 |
过氧化氢 | 2mL | 2mL | 2mL | 2mL | 2mL |
试剂或材料 | 1mL唾液 | 锈铁钉 | 生土豆块 | 熟土豆块 | 生土豆块和稀酸 |
实验现象 | 几乎无气泡 | 少量气泡 | 大量气泡 | 几乎无气泡 | 少量气泡 |
试管号 | 试管内容物 | 条件 | 检验 |
1 | 2mL浆糊+2mL纯唾液 | 37℃10min | 3滴碘液 |
2 | 2mL浆糊+2mL清水 | 37℃10min | 3滴碘液 |
3 | 2mL浆糊+2mL稀释10倍唾液 | 37℃10min | 3滴碘液 |
4 | 2mL浆糊+2mL纯唾液 | 0℃10min | 3滴碘液 |
5 | 2mL浆糊+2mL纯唾液+2滴浓HCl | 37℃10min | 3滴碘液 |
试题篮