Metal Deficiency Defect

Q. Iron oxide exist in form of

Fe_0.95O and Fe_0.93O also

1. True
2. False

Q. 60 Which of the following point defects are shown by agbr solid crystal 1) schottky defect 2) Frenkel defect 3) metal excess defect 4) metal deficiency defect

Q. Question 15-16 is based on the following given information: A sample of ferrous oxide has actual formula $F{e}_{0.93}O$. What type of nonstoichiometric defect is present in this sample?

1. Impurity defect
2. Metal excess defect due to presence of extra cations at interstitial sites
3. Metal excess defect due to anionic vacancies
4. Metal deficiency defect

Q.

In metal deficiency defect

1. Cations are missing from the lattice points

2. Anions are missing from the lattice points

3. Charge of the anion is increased

4. Charge of the anion is decreased

Q. (c) 2 x 10-7 N(d) None of these122. The composition of a sample of Wustite is Fe o, 930. What is the percentageFe3+ in total iron?(a) 15.05%(c) 35%93(d) 45%

Q.

A sample of clay contain 12% water which is partially dried and then found (after drying) 40% silica and 7% water. What is the percentage of silica in the original sample ?