<span>Non-stoichiometric defects are </span>compounds which contain the combining elements in a ratio different from that required by their stoichiometric formula. The solids with metal excess <span>defect </span>contain metal in excess to the stoichiometric ratio. Such defect is caused due to either of the following reasons:
1. <span>Metal excess Defect due to Anionic Vacancies:
In this, </span>negative ions may be missing from their lattice sites leaving holes in
which the electrons remain entrapped to maintain the electrical
neutrality.
2. Metal excess defect due to the presence of extra cations at interstitial sites:
In this case, there are extra positive ions occupying interstitial
sites and the electrons in another interstitial sites to maintain
electrical neutrality. The defect may be visualized as the loss of
non-metal atoms which leave their electrons behind. The excess metal
ions occupy interstitial positions.
The answer to this question is false
Answer:
1. 2nd choice
2. 2nd choice
5. 2nd choice
6. 2nd choice
(I find these multiple choices questionable...)
Explanation: I'm honestly too lazy to do the math for the rest but the conversions can be done simply by using a ratio like ½ = ⅓ and you cross multiply (you'll probably have one side with a variable, just divide both sides by the number multiplied to the variable if necessary).
