Chemistry Questions - Redox Reaction

How about another Chemistry Question on Redox Reactions as a food for thoughts over the weekend...

Q) Which of the following conversions is a redox reaction (involves oxidation/reduction)?

A)H+ => H20
B)NO2 => NO3^-
C)SO2 => SO3^2-
D)SO3 => SO4^2-

Enjoy and take care.

Rgds,
Sean
SimpleChemConcept

Chemistry Question - Electrolysis/Mole Concept

Hey student,

Here is another one for you to think about. Yup. O Level Prelimary Chemistry question. Think about it and let me know.

Q)A certain quantity of electricity liberates 9g of aluminiun. The volume of oxygen liberated at r.t.p from dilute sulphuric acid by the same quantity of electricity is:

A)6 dm^3
B)8 dm^3
C)12 dm^3
D)24 dm^3

Happy trying. Rmbr: Best thing is to write it down and play around with the equations. You will see the light in the tunnel....


Sean
SimpleChemConcepts

Qn answered and explained under comments

A-Math More Trigo Graphs

On the same diagram, sketch the graphs of

y=sin 3x & y=cos2x,
for x between 0 degree and 180 degree
Hence state the number of soutions to the equation
sin 3x=cos 2x
in the interval 0 degree less than or equals to x which is less then or equals to 180 degree


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