AFNS — AFNS Chemistry
Chemical Equilibrium
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#25 pH of neutral solution:
A) 7
B) 0
C) 14
D) 1
Answer: A
#26 pH < 7 is:
A) Acidic
B) Basic
C) Neutral
D) Salt only
Answer: A
#27 pH > 7 is:
A) Basic
B) Acidic
C) Neutral
D) Always 14
Answer: A
#28 pH = -log[H+]:
A) True definition
B) log[OH-]
C) Only for bases
D) Mass ratio
Answer: A
#29 Buffer resists:
A) pH change
B) Temperature only
C) Pressure only
D) Colour only
Answer: A
#30 Common buffer pair:
A) Weak acid + its salt
B) Strong acid + strong base
C) Only NaCl
D) Only water
Answer: A
#31 Solubility product Ksp for:
A) Sparingly soluble salts
B) All strong acids
C) Gases only
D) Metals only
Answer: A
#32 Precipitation occurs when Q:
A) Greater than Ksp
B) Less than Ksp
C) Equals zero always
D) Equals infinity
Answer: A
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