101) An element (atomic mass = 100 gm⁄mol) having bcc structure, has unit cell edge 400 pm. The density of the element is:
Answer is:
5.188 gm⁄cc
Related Physical Chemistry MCQ with Answers
Answer is:
F−center
Explanation:
When the electron takes the place of an anion in a crystal, then a non−stoichiometry arises. This extra electron is delocalised and when it absorbs light, it gets excited from ground state to higher energy state, and the crystal thus, appeared coloured. The site at which this extra electron is placed is called the F−center.
Answer is:
All of these
Explanation:
The yellow colour of ZnO and conducting nature produced upon heating is due to
* Metal excess defects due to interstitial cation
* Extra positive ions present in an interstitial site
* Trapped electrons