Question

S test
2. When fructose is heated with conc. HCl it
gives​

Answer 1

Answer:

• When heated strongly or when treated with warm concentrated sulphuric acid, glucose is dehydrated to give a black mass

• Fructose and sucrose are two common sugars which give a positive test. Sucrose gives a positive test as it is a disaccharide consisting of fructose and glucose. Generally, 6M HCl is used to run this test. Ketose get dehydrated faster and hence they give the test faster.