Science

question : what makes glass different from quartz under what conditions quartz is converted into glass ? key points to answer this question : explain the glass property in point of view quartz and then differentiate both glass and Quartz on basis of their properties. solution : Glass is type…

question : define the term amorphous with example or amorphous definition and examples class 12 chemistry ? Key points to solve this question : remember the Amorphous word is a Greek word that contains the meaning ‘no form’ it means the Amorphous does not contain any type of form or…

question : a group 14 element is to be converted into n type semiconductor by doping it with a suitable impurity. To which group should this impurity belong ? key points to answer this question : first of all you have to remember that n type semiconductor means there is…

Question : Ionic solids , which have anionic vacancies due to metal excess defect , develop colour. Explain with the help of a suitable example ? key points to answer this question : first recall which thing is responsible in solids for colors , so remember the Free unpaired electrons…

question : Explain how vacancies are introduced in an ionic solid when a cation of higher valence is added as an impurity in it ? key points to remember answer of this question : first of all Recall the definition of impurity defects occurred in solids with examples also ,…

question : what type of stoichiometric defect is shown by (i) zns and (ii) agbr key points to remember answer this question : First of all you have to remember that there is very big difference between zns and agbr on the basis of size of ions present in zns…

question : An element with molar mass 2.7×10-2 kg mol-1 forms a cubic unit cell with edge length 405 pm. If its density is 2.7×103 kg m-3, what is the nature of the cubic unit cell ? Key points to answer this question : First of all we need to calculate the…

Question : Which of the following lattices has the highest packing efficiency – simple cubic lattice body-centred cubic lattice (BCC) hexagonal close-packed lattice (HCP) Key point to answer this question :  Remember the packing efficiency of all lattices asked in our question which are simple cubic , BCC and HCP…

Question : A compound is formed by two elements M and N. The element N forms ccp and atoms of M occupy 1/3rd of tetrahedral voids. What is the formula of the compound ? key points to crake this question : First of all we have to calculate tetrahedral voids present…