EASY
7th West Bengal Board
IMPORTANT
Earn 100

Which of the following substances do you think are crystalline?

Sugar, chalk dust, lime, sand, talcum powder, alum.

Important Questions on Role of Substances in Environment

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 31>Q (a)

What is the taste of butter or cream?

EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 32>Q (a)

What is the source of butter and cream- animal or plant?

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 32

How many types of salt do we use nowadays in food?

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 32>Q (a)

Which of the following metal has the maximum types of compounds in sea?

Sodium, magnesium, potassium, calcium.

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 32>Q (b)

Analysis of sea salt shows the amount of _____ metal to be next to that of sodium.

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 32>Q (c)

Write the chemical formula of calcium chloride, which is a minor constituent compound present in the sea salt.

EASY
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 32

What is the source of the salt that we use in our daily life?

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 4 - Role of Substances in Environment>Exercise 33>Q (a)

Which constituent is mostly present in our body fluid?