Test: The Solid State (Old NCERT) - NEET MCQ

Ferromagnetic substance get permanently magnetised in applied Magnetic Field.

In molten state ions can exist so they can conduct electricity

• This yellow colour is due to metal excess defect of anionic valency.
• Na+ion deposited on the surface of crystal of NaCl . The Cl-ion diffused to form NaCl. This happens by loss of electron from Na to Na+.
• The released electro diffused into the crystal and occupy anionic site called F center which imparts yellow colour to NaCl.

In frenkel defect cation gets dislocated from its position.

All of the above mentioned methods are used to detect the basic structure of the sample, hence can easily detect the defects present in a sample.

Point defects are zero dimensional defects as they cannot extend in any direction in space. Point defects occur where an atom is missing or misplaced in a crystal lattice. The limit of the size of point defect is not defined.

Covalent solid doesnot conduct electricity in molten and solid state.

O=C=O<−>−O−C+=O

Polar molecule will act as a dipole.

In body centred cubic cell, an atom at the body-centre is shared by 1 unit cell. Thus, this atom contributes one atom to the unit cell.

Metals have low ionization energy because of there tendency to lose electrons.

NaCl has rock salt structure. Coordination No. is 6.

Coordination No. in NaCl is 6.

ZnS shows Frenkel defect.

Group 15 doping on group 14 element forms n type semiconductor due to excess electrons.

Doping of group 14 elements with group 13 forms p type semiconductor.

• An ionic compound is a giant structure of ions.
• The ions have a regular, repeating arrangement called an ionic lattice .
• The lattice is formed because the ions attract each other and form a regular pattern with oppositely charged ions next to each other.

It has network Structure.

Extra electron is present at anionic site.

N type semiconductors have excess electrons.

A Frenkel defect or dislocation defect is a type of point defect in crystalline solids named after its discoverer Yakov Frenkel. The defect forms when an atom or smaller ion (usually cation) leaves its place in the lattice, creating a vacancy, and becomes an interstitial by lodging in a nearby location.

Rhenium oxide and cooper oxide have same appearance and conductivity.