NCTB Class 7 Home science Chapter 11“Preservation of Food” Solution

Bangladesh Board Class 7 Home science Solution Chapter 11“Preservation of Food” Exercises Question and Answer by Experienced Teacher.

NCTB Solution Class 7 Chapter 11 “Preservation of Food”

Board	NCTB Bangladesh Board
Class	7
Subject	Home science
Chapter	Eleven
Chapter Name	“Preservation of Food”

Multiple choice questions:

(1) What is the minimum temperature of a refrigerator?

Answer:- 2⁰ to 6⁰C.

(2) The fruits mentioned in the stem became unsuitable to sell because they were attacked by-

Answer:- Enzyme.

(3) Mangoes which were brought from Rajshahi

Answer:- Got black in colour.

Creative questions:

(1) (a) Under what circumstances does the growth to bacteria decrease?

Answer:-  In high temperature and drier atmosphere the growth of bacteria decrease.

(1) (b) Fungus develops a soft green and grey layer over the food-explain.

Answer:- This kind of fungus increase in the presence of warm temperature humidity and air. Its create a soft green and grey layer over the food.

(1) (c) Explain Sumaiya Khatun’s way of food preservation of picture 2.

Answer:- In picture-2 we can see fish meat and which is can preserve in refrigerator.

(1) (d) Under what circumstances does the growth of bacteria decrease?

Answer:-  Yes, it is possible to keep the food original for a long time if they are tried properly in sunlight.