在下列实验中,试管内容物变成蓝色的是( )
试管号 |
试管内容物 |
条件 |
检验 |
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1 |
2mL浆糊+2mL纯唾液 |
37℃ 10min |
3滴碘液 |
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2 |
2mL浆糊+2mL清水 |
37℃ 10min |
3滴碘液 |
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3 |
2mL浆糊+2mL稀释10倍唾液 |
37℃ 10min |
3滴碘液 |
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4 |
2mL浆糊+2mL纯唾液 |
95℃ 10min |
3滴碘液 |
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5 |
2mL浆糊+2mL纯唾液+2滴浓HCl |
37℃ 10min |
3滴碘液
|