Question

Which of the follownig food items become oxidised if placed for a few hours in open?

(a) Dark green vegetables

(b) Biscuits

(d] Potato

(c)Oil

Answer 1

Answer:

Ans d Potato is correct.

Answer 2

(b) Potato becomes oxidized if placed for a few hours in open.

Explanation:

• When we cut the potatoes, the enzyme called polyphenol oxidase presents in potatoes reacts with oxygen in the air, turning the potato into brown in color.
• The process of oxidation occurs, because potatoes are starchy vegetable.
• The color change is simply an enzymatic reaction.
• The easiest way to prevent oxidation is to put the potatoes in a bowl pf water after cutting.

• Hence, The enzyme called polyphenol oxidase (PPO) also known as tyrosinase presents in potatoes is responsible for the oxidation.