Acids and Bases

Q: What is the pH of a 1 molar solution, of an acid that has a Ka = 10-8 ?

(a) :  1
(b) :  4
(c) :  8
(d) :  10
(e) :  None of the Above
Answer:  4
Explanation:  

Q: Which of the following can function as Lewis acid?

(a) :  :I:
(b) :  Cl-
(c) :  CH3−O−CH3
(d) :  :Br-
(e) :  None of the Above
Answer:  :I:
Explanation:  A Lewis acid, called an electrophile, can accept a pair Of electrons while a Lewis base called neuclophile can donate a pair of electrons.

Q: The products obtained from the following chemical reaction are: HNO3+ Ca(Od)2 →

(a) :   CaNO3 + H2O
(b) :   Ca(NO3)2 + 2H2O
(c) :  CaO + 2NO2 +3H2O
(d) :  Ca + 2NO3 + 2H2O
(e) :  None of the Above
Answer:  Ca(NO3)2 + 2H2O
Explanation:  

Q: Which reaction does not involve neutralization?

(a) :  H2SO4 + 2NH3 → (NH4)2SO4
(b) :  H2SO4 + BaCl2 → BaSO4+ 2HCl
(c) :  H2SO4+ CuO →CuSO4 + H2O
(d) :   H2SO4+ Na2CO3 →Na2SO4+ CO2+ H2O
(e) :  None of the Above
Answer:  H2SO4 + BaCl2 → BaSO4+ 2HCl
Explanation:  It is precipitation reaction.

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