NEET BIOLOGY

Detailed explanation-1: -If it changes to orange, then it means that 1 to 1.5 percent sugar is present. If color changes to red, then 1.5 to 2.0 percent sugar is present. And if color changes to brick red, it means that more than 2 percent sugar is present in solution.

Detailed explanation-2: -These include starch, cellulose, and glycogen. One test for the presence of many simple carbohydrates is to use Benedict’s reagent. It turns from turquoise to yellow or orange when it reacts with reducing sugars. These are simple carbohydrates with unbound aldehyde or ketone groups.

Detailed explanation-3: -When Benedict’s reagent solution and reducing sugars are heated together, the solution changes its colour to orange-red/ brick red. This colour is due to the presence of simple carbohydrates. In specific, the copper (II) ions in Benedict’s solution are reduced to Copper (I) ions, which causes the colour change.

Detailed explanation-4: -We can use a special reagent called Benedict’s solution to test for simple carbohydrates like glucose. Benedict’s solution is blue but, if simple carbohydrates are present, it will change colour – green/yellow if the amount is low and red if it is high.