Advertisements
Advertisements
Question
Explain why this happens and suggest possible remedies.
Cut fruits have turned black.
Advertisements
Solution
Fruit contains an enzyme called polyphenol oxidase or tyrosinase that reacts with oxygen. The oxidation reaction basically forms a sort of rust on the surface of fruits so it turns black. Small amount of lemon juice should be applied to the surface of cut fruits as it prevents the oxidation of the fruits.
RELATED QUESTIONS
Look at the pictures given below. Which one is good for health? Why?
 |
 |
Which one can be eaten as raw food?
Food should not be purchased beyond the date of ______.
Give reason for the following statement.
Salt is added as a preservative in pickles
Unscramble the jumbled word underlined in the following statement.
Yeasts are used in the wine industry because of their property of meronettinaf
Give reason for the following.
Raw vegetables and fruits are kept in refrigerators, whereas jams and pickles can be kept outside.
What shall we do?
A ‘pani-puriwala’ is serving the panipuri with dirty hands.
Give reason.
Food remains safe at 5° Celsius.
Find the odd-man-out.
Find the odd-man-out.
