Substances that are strongly attracted by applied magnetic field and can be permanently magnetized are
Ferromagnetic substance get permanently magnetised in applied Magnetic Field.
Which type of solid conduct electricity in molten state but not in solid state?
In molten state ions can exist so they can conduct electricity
Yellow colour of NaCl crystals in sodium vapour is due to
Dislocation defect is also known as
In frenkel defect cation gets dislocated from its position.
Defects in solids can be studied using
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 defect is also known as
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.
Solid X is a very hard electrical insulator in solid as well as in molten state. It melts at extremely high temperature. Solid X is a
Covalent solid doesnot conduct electricity in molten and solid state.
Nature of binding forces present in carbondioxide molecules in solid state are?
What type of interaction hold the molecules together in a polar molecular solid?
Polar molecule will act as a dipole.
An atom located at the body center of a cubic unit cell is shared by
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.
Ionization enthalpy is lowest in
Metals have low ionization energy because of there tendency to lose electrons.
The coordination number of AB having rock salt geometry is
NaCl has rock salt structure. Coordination No. is 6.
MgO has the structure of NaCl. The coordination number of the ions in MgO is
Coordination No. in NaCl is 6.
Type of stoichiometric defect shown by ZnS is
ZnS shows Frenkel defect.
A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is
An element forms a cubic unit cell with edge length 405 pm. Molar mass of this element is 2.7 X 10-2 Kg/mol and its density is given as 2.7 X 103 Kg/m3. How many atoms of this elements are present per unit cell.
A group of 14 element is converted into n – type semiconductor by dopping it with
Group 15 doping on group 14 element forms n type semiconductor due to excess electrons.
Group 14 element is converted to p – type semiconductor by dopping it with
Doping of group 14 elements with group 13 forms p type semiconductor.
Giant ionic structures is also name given to
A substance forms face centered cubic crystals. Its density is 1.984 g/cm3 and the length of the edge of the unit cell is 630 pm. Calculate the molar mass in g/mol?
The hardest substance among the following is
It has network Structure.
The following diagram shows :
Extra electron is present at anionic site.
In n – type semiconductor current is carried by
N type semiconductors have excess electrons.
The following diagram shows
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.
Which transition metal oxide has appearance and conductivity like that of copper?
Rhenium oxide and cooper oxide have same appearance and conductivity.