Bihar Board Class 12th - Class 12 Bihar Board Chemistry

Solid State Chemistry (Class 12)

States of Matter and Solid State Focus Matter exists in different physical states: solid, liquid, gas, plasma, and Bose-Einstein condensate. For exam purposes, focus is on solid, liquid, and gas, with solids being the main subject. Solids have a definite shape and volume,...

Which of the following is an example of an amorphous solid?

Glass

What is the main property that distinguishes a solid from a liquid?

Solids have a fixed shape and volume

Which of the following is an example of an amorphous solid?

Glass

What is the main property that distinguishes a solid from a liquid?

Solids have a fixed shape and volume

What are diamagnetic and paramagnetic substances, and what causes their magnetic properties?

Diamagnetic substances are repelled by an external magnetic field due to the absence of unpaired electrons. Paramagnetic substances are weakly attracted by an external magnetic field due to the presence of unpaired electrons. An example of a paramagnetic substance is Oxygen (O₂).

Explain the characteristics of ferromagnetic, antiferromagnetic, and ferrimagnetic substances.

Ferromagnetic substances are strongly attracted by an external magnetic field, with magnetic domains aligned in the same direction. Antiferromagnetic substances have magnetic domains aligned in opposite directions in equal numbers, resulting in a net zero magnetic moment. Ferrimagnetic substances have magnetic domains aligned in opposite directions but in unequal numbers, leading to a net magnetic moment weaker than ferromagnetism.