Acids, Bases and Salts
Q. What is the conjugate base of H2SO4?
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A.
HSO4-
-
B.
SO4^2-
-
C.
H3O+
-
D.
H2O
Solution
The conjugate base of H2SO4 is HSO4-, formed when H2SO4 donates a proton (H+).
Correct Answer: A — HSO4-
Q. What is the primary product of the reaction between NaOH and HCl?
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A.
NaCl
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B.
H2O
-
C.
NaCl and H2O
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D.
NaH
Solution
The reaction between NaOH and HCl produces NaCl (sodium chloride) and H2O (water) as products.
Correct Answer: C — NaCl and H2O
Q. What is the primary role of a base in a neutralization reaction?
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A.
To donate protons
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B.
To accept protons
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C.
To produce salts
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D.
To increase pH
Solution
In a neutralization reaction, a base acts as a proton acceptor, reacting with an acid to form water and a salt.
Correct Answer: B — To accept protons
Q. Which of the following acids is diprotic?
-
A.
HCl
-
B.
H2SO4
-
C.
HNO3
-
D.
CH3COOH
Solution
H2SO4 (sulfuric acid) is a diprotic acid, meaning it can donate two protons (H+ ions) in solution.
Correct Answer: B — H2SO4
Q. Which of the following compounds is a salt?
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A.
NaCl
-
B.
H2O
-
C.
NH3
-
D.
H2SO4
Solution
NaCl (sodium chloride) is a salt formed from the neutralization of an acid (HCl) and a base (NaOH).
Correct Answer: A — NaCl
Q. Which of the following is a characteristic of a strong base?
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A.
It has a high pH
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B.
It is a weak electrolyte
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C.
It does not dissociate in water
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D.
It has a low conductivity
Solution
Strong bases, like NaOH, have a high pH and completely dissociate in water, leading to high conductivity.
Correct Answer: A — It has a high pH
Q. Which of the following is a Lewis acid?
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A.
BF3
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B.
NH3
-
C.
H2O
-
D.
NaOH
Solution
BF3 (boron trifluoride) is a Lewis acid because it can accept an electron pair.
Correct Answer: A — BF3
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