GCSE Chemistry Question Analysis Topic: Chemistry - Short Questions
1) Based on molecular forces, what type of polymer is neoprene?
2) (i) Write the type of magnetism observed when the magnetic moment are aligned in parallel and anti-parallel directions in unequal numbers?
(ii) Which stoichiometric defect decreases the density of the crystal?
1) Neoprene is an elastomer because of molecular forces. The polymer shows elasticity.
It is used to make rubber bands because it is soft and elastic.
2) (i) Ferrimagnetism: When the magnetic moments of the substance's domains are aligned in unequal numbers in parallel and anti-parallel directions, the phenomenon of ferrimagnetism is the result.
(ii) Vacancy defects: A vacancy defect occcurs when certain lattice sites are left empty during crystal formation. An atom is absent from its normal atomic site in vacancy defects. The density of a substance falls when an atom is missing, or when there are vacancy defects.
End of analysis. Great!