BSAC 204-Before-final-exam_Part 3

How many electrons per 1 sulfur involves in the following reaction:

H₂SO₃ --->  HSO₄^– ?

• 0 electron

• 1 electron

• 2 electrons

• 4 electrons

How many species in the equation below involve in the calculation of the Q value in the Nernst equation?

AgCl(s) + e^- ---> Ag(s) + Cl^-(aq)

• 1

• 2

• 3

• 4

Which of the following reactions is considered as a comproportionation reaction (unbalanced)?

• Co³⁺   -->  Co   +   Co²⁺

• Fe²⁺   -->  Fe   +   Fe³⁺

• Co   +   Co²⁺ --> Co³⁺

• Fe   +   Fe³⁺ --> Fe²⁺

What is the equation for the construction of Frost diagrams?

• X(N) + Ne^-  --> X(0)

• X(0) --> X(N) + Ne^-

• X(N) --> X(0) + Ne^- 

• X(0) + Ne^-  --> X(N)

In the frost diagram, which species is the least stable one?

• The one with the lowest N.

• The one with the highest N.

• The one with the lowest NE^o.

• The one with the highest NE^o.

Which type of diagrams can be used to predict which temperature is suitable for converting Al₂O₃ to Al ?

• Pourbaix diagram

• Frost diagram

• Latimer diagram

• Ellingham diagram

Which species are commonly used for the reduction of metal oxides to pure metals?

• C and CO

• CO and CO₂

• C and CO₂

• C, CO, and CO₂

What is the final exam date for this class?

• 24 Nov, 8.30-10.30 AM

• 24 Nov, 1.00-3.00 PM

• 26 Nov, 8.30-10.30 AM

• 26 Nov, 1.00-3.00 PM

• On earth, oxygen is the most abundant element, making up about 47% of the earth's mass.

• Which element is second ?

• Si

• Fe

• Al

• Mg

Which of the following is NOT an element in the periodic table?

• Bohrium (Bh)

• Nobelium (No)

• Roentgenium (Rg)

• Thailium (Th)