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calculate ionisation potential of the electron in the first exited state of singly ionised helium atom is given by ionisation of hydrogen atom to be
there are 13 electrons in an element whose nucleus comprise 14 neutrons obtain atomic number and atomic weight of this element if atomic weight of
when does intrinsic semiconductor become an extrinsic semiconductor illustratesemiconductor doping is the process which changes an intrinsic
how are p-type and n-type semiconductor obtained a p-type semiconductor is attained by carrying out a process of doping which is adding a certain
what are similarities and differences of primitive cells and unit cells ans unit cell is the basic building block
what are total variables and degrees of freedom of a system of two components when the number of phases is one two three etc ans for two -
explain tie-line ruletie-line rule is applied to determine the compositions of two co-existing phases in a binary phase diagram tie line is a
two containers are connected by a stopcock gas a is at pressure 202kpa while gas b is at pressure 140kpa what will be the resultant pressure when the
a solution is prepared with 385g of a non-ionic unknown compound in 1000g cyclohexane the solution had a freezing point of 418 degrees celsius what
what are the interfacial defects grain boundaries are interfaces where crystals of dissimilar orientations meet a grain boundary is a single-phase
burgers vector in screw dislocationthe burgers vector often signified by b is a vector that shows the magnitude and direction of the lattice
determine the rate constant from the concentration-time dependence time
interfacial defects grain boundaries are interfaces where crystals of dissimilar orientations meet a grain boundary is a single-phase interface
dislocations-linear defects dislocations are abrupt alters in the regular ordering of atoms along a line
state the term- solubilitysolid solutions are made of a host the solvent or matrix which dissolves the solute minor component the ability to dissolve
impurities of solidsimpurities are frequently added to materials to improve the properties for example carbon added in small amounts to iron makes
explain about the interstitial defectsan interstitial is an atom that occupies a place outside the normal lattice position it might be the similar
what is frenkel defecta pair of one cation and one anion can be missing from an ionic crystal as shown in the following figure such a pair of vacant
what are the lattice vacanciesthe lattice vacancies are a stable feature of metals at all temperatures above absolute zero by successive jumps of
vacancies a vacancy is a lattice position that is vacant due to the atom is missing it is formed when the solid is formed vacancies are simply
explain about phosphprous and its allotrpes white phosphorus - crystalline solid p4 red phosphorus - polymeric solid scarlet phosphorus violet
carbon and its allotropes diamond - an extremely hard transparent crystal with the carbon atoms arranged in a tetrahedral lattice a poor electrical
explain in detail about the allotropy allotropy refers only to dissimilar forms of an element within the similar phase or state of matter ie
give example of allotropythe element carbon has two common allotropes diamond where the carbon atoms are bonded together in a tetrahedral lattice