Energetics-Equilibrium-Redox

Q: Which one of the following is an example of homogeneous catalysis?

(a) :  Formation of ghee from oil
(b) :  Formation of SO3 in contact process
(c) :  Hydrolysis of ester
(d) :  Formation of NH3 in Haber's process
(e) :  None of the Above
Answer:  Formation of SO3 in contact process
Explanation:  

Q: NH3+H2O → NH4++OH- For above reaction Calculate the ionization constant if the [NH4]+ is 10-4 M, [NH3] is 1.0 M and [OH]- is 0.8 M respectively.

(a) :  1.8*10-5
(b) :  1.8*10-4
(c) :  10.-4
(d) :  1.8
(e) :  None of the Above
Answer:  1.8
Explanation:  

Q: The equation ΔG= ΔH- ΔTS tells us that an exothermic reaction will be associated with which of the following? (i) Negative ΔH (ii)Positive ΔH (iii)More disordered positive ΔS (iv)A spontaneous reaction

(a) :  1 and 4
(b) :  2 and 3
(c) :  2 and 4
(d) :  1.3 and 4
(e) :  None of the Above
Answer:  1 and 4
Explanation:  

Q: What happens when zinc is placed in aqueous copper (II) sulpahte?

(a) :  Copper atoms are oxidized
(b) :  Zinc atoms are oxidized
(c) :  Copper ions are oxidized
(d) :  Zinc ions are oxidized
(e) :  None of the Above
Answer:  Zinc atoms are oxidized
Explanation:  

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