MEDIUM
7th West Bengal Board
IMPORTANT
Earn 100

What is a thermosetting plastic? Give an example.

Important Questions on Sample Questions

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7
Concrete needs to be watered. Why?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7
What name can you suggest for a reaction that is the reverse of a direct addition?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7

Balance the following equation.

Na2CO3+HCl→NaCl+CO2+H2O

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7

Balance the following equation.

CuNO32→CuO+4NO2+O2

MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7
Name two synthetic polymers.
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7
Which elements taken together, comprise 97% of the total mass of a human body?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7
What is the role played by the lipid bilayer beneath our skin?
MEDIUM
7th West Bengal Board
IMPORTANT
Environment and Science Class 7>Chapter 9 - Sample Questions>Sample Questions>Q 7
Name one primary host and a secondary host of the malaria parasite.