Acids and Bases

Q: The products obtained from the following chemical reaction are: H2SO4 + NH3 →

(a) :  (NH4)2SO4
(b) :  4H2O + N2S3
(c) :  NH4SO4
(d) :  H2O + NH3SO3
(e) :  None of the Above
Answer:  (NH4)2SO4
Explanation:  

Q: Which calcium compound does not Scram the pH of acidic soils?

(a) :  CaCO3
(b) :   Ca(OH)2
(c) :  CaO
(d) :  CaSO4
(e) :  None of the Above
Answer:  CaSO4
Explanation:  Calcium sulphate is an insoluble salt that does not react with acids. Calcium carbonate reacts with the acids in soil to form carbon dioxide, a neutral salt and water. Both calcium oxide and calcium hydroxide are alkalies that neutralize the acids to form a neutral salt solution.

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.

Q: Which of the following compounds is the strongest acid?

(a) :  CH4
(b) :  NH3
(c) :   H2O
(d) :  HF
(e) :  None of the Above
Answer:  HF
Explanation:  

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