i. A qualitative test for proteins: Xanthoproteic test
| Experimental Material | Observation | Inference |
| (a) Urine | Yellow precipitate | The formation of yellow precipitate suggests the presence of protein in the food material |
| (b) Water | No precipitate |
ii. A qualitative test for fats: Emulsification test
| Experimental Material | Observation | Inference |
| (a) Sweat | Oil droplets | Formation of oil droplets i.e., emulsification signifies the presence of fats in the provided food material. |
| (b) Water | No oil droplet |
iii. A qualitative test for oils: Paper test
| Experimental Material | Observation | Inference |
| (a) Food material (sample) |
Paper turns into a Translucent |
Opaque paper becomes translucent which suggests the presence of fats in the food material |
| (b) Water | Paper gets soggy |
iv. A qualitative test for starch: Iodine test
| Experimental Material |
Observation | Inference |
| (a) Fruit juices | Blue-black colour when few drops of iodine are added. |
The formation of blueblack colour suggests the presence of starch in the provided food material. |
| (b) Water | No change in colour |
Answered by Abhisek | 1 year ago
Find out exactly how much cellulose is produced by the plants in the biosphere and then compare it to how much paper is produced by human beings and therefore, what is the use of plant material by man each year. What a loss of vegetation?
Attempt titrating an amino acid against a weak base and discover the number of dissociating (ionisable) functional groups in the amino acid.