Ka of weak acid and Kb of conjugate base related by?
A
Ka × Kb = Kw
B
Ka + Kb = Kw
C
Ka – Kb = Kw
D
None
Question 3Single Answer
pH of salt solution depends on?
A
Hydrolysis of ions
B
Pressure only
C
Color only
D
Temperature only
Question 4Single Answer
Hydrolysis of KCN gives?
A
Basic solution
B
Acidic solution
C
Neutral solution
D
None
Question 5Single Answer
Hydrolysis constant Kh for basic salt?
A
Kw / Kb
B
Kw / Ka
C
Ka / Kw
D
Kb / Ka
Question 6Single Answer
Strong acid + weak base salt undergoes?
A
Acidic hydrolysis
B
Basic hydrolysis
C
No hydrolysis
D
Colloidal formation
Question 7Single Answer
Weak acid + strong base salt undergoes?
A
Basic hydrolysis
B
Acidic hydrolysis
C
Neutral
D
None
Question 8Single Answer
Hydrolysis constant Kh for acidic salt?
A
Kw / Ka
B
Ka / Kw
C
Kb / Kw
D
Kb × Ka
Question 9Single Answer
Common ion effect decreases?
A
Solubility and ionization
B
Only color
C
Only pH
D
None
Question 10Single Answer
Ionic product of water increases with?
A
Temperature
B
Pressure only
C
Color
D
None
Question 11Single Answer
Strong acid-strong base salt solution is?
A
Neutral
B
Acidic
C
Basic
D
Colloidal
Question 12Single Answer
Weak acid-weak base salt pH depends on?
A
Relative Ka and Kb
B
Pressure only
C
Color only
D
Viscosity
Question 13Single Answer
Fractional ionization a decreases by?
A
Common ion effect
B
Temperature increase
C
Dilution
D
Pressure increase
Question 14Single Answer
Buffers resist pH change due to?
A
Addition of small amounts of acid or base
B
Temperature change
C
Pressure change
D
Viscosity
Question 15Single Answer
Neutral solution pH at 25°C?
A
7
B
0
C
14
D
1
Question 16Single Answer
Buffer solution resists change in?
A
pH
B
Color
C
Density
D
Temperature
Question 17Single Answer
Acidic buffer is made of?
A
Weak acid + its salt
B
Strong acid + strong base
C
Weak base only
D
Strong base only
Question 18Single Answer
Basic buffer is made of?
A
Weak base + its salt
B
Strong acid + strong base
C
Weak acid only
D
Strong acid only
Question 19Single Answer
pH of acidic buffer solution?
A
<7
B
>7
C
=7
D
14
Question 20Single Answer
pH of basic buffer solution?
A
>7
B
<7
C
=7
D
0
Question 21Single Answer
Buffer capacity increases with?
A
Concentration of acid and salt
B
Dilution
C
Temperature only
D
Pressure only
Question 22Single Answer
pH change in buffer occurs when?
A
Excess strong acid or base is added beyond capacity
B
Small amounts of acid added
C
Small amounts of base added
D
Pressure applied
Question 23Single Answer
Basic buffer pH calculation depends on?
A
Kb and concentrations of B and BH
B
Temperature only
C
Pressure only
D
Color
Question 24Single Answer
Buffers maintain pH by?
A
Neutralizing added acid or base
B
Changing color
C
Changing temperature
D
Changing density
Question 25Single Answer
Strong base added to acidic buffer reacts with?
A
Weak acid (HA)
B
Conjugate base (A)
C
Water only
D
Salt
Question 26Single Answer
Strong acid added to basic buffer reacts with?
A
Weak base (B)
B
Conjugate acid (BH)
C
Water only
D
Salt
Question 27Single Answer
Strong base added to basic buffer reacts with?
A
Conjugate acid (BH)
B
Weak base (B)
C
Water only
D
Salt
Question 28Single Answer
pH of buffer depends mainly on?
A
Ratio [salt]/[acid]
B
Absolute concentrations
C
Pressure only
D
Temperature only
Question 29Single Answer
pH of acidic buffer increases when?
A
Base added
B
Acid added
C
Pressure applied
D
Temperature increased
Question 30Single Answer
pH of basic buffer decreases when?
A
Acid added
B
Base added
C
Pressure applied
D
Temperature increased
Question 31Single Answer
Maximum buffer capacity occurs at pH?
A
Equal to pKa
B
7
C
14
D
0
Question 32Single Answer
Buffer solution pH is independent of?
A
Small volume additions of acid or base
B
Large additions
C
Total dilution beyond capacity
D
Pressure
Question 33Single Answer
pH meter measures?
A
Hydrogen ion activity
B
Hydroxide only
C
Buffer capacity
D
Solubility
Question 34Single Answer
Universal indicator measures?
A
pH
B
Pressure
C
Temperature
D
Buffer capacity
Question 35Single Answer
Buffer capacity depends on?
A
Total concentration of acid and salt
B
Ratio only
C
Temperature
D
Pressure
Question 36Single Answer
pH of blood?
A
7.35–7.45
B
7.0
C
6.5
D
8
Question 37Single Answer
pH of stomach juice?
A
1–3
B
7
C
8
D
5–6
Question 38Single Answer
Buffer action prevents?
A
Large pH fluctuations
B
Temperature changes
C
Color change
D
Pressure change
Question 39Single Answer
Respiratory acidosis is corrected by?
A
Blood buffer
B
Kidneys only
C
Liver
D
Lungs
Question 40Single Answer
Metabolic acidosis is corrected by?
A
Blood buffer and kidney excretion
B
Lungs
C
Liver
D
Skin
Question 41Single Answer
Acidic buffer effective range?
A
pH = pKa ± 1
B
pH = 7 only
C
pH = 14 only
D
None
Question 42Single Answer
Basic buffer effective range?
A
pH = pKb ± 1
B
pH = 7 only
C
pH = 0 only
D
None
Question 43Single Answer
Buffer solution can neutralize?
A
Added small amounts of acid or base
B
Large amounts
C
Pressure changes
D
Temperature changes
Question 44Single Answer
Addition of strong acid to buffer?
A
Conjugate base reacts
B
Weak acid reacts
C
Water reacts
D
None
Question 45Single Answer
Addition of strong base to buffer?
A
Weak acid reacts
B
Conjugate base reacts
C
Water reacts
D
None
Question 46Single Answer
Blood buffer maintains pH?
A
~7.4
B
7.0
C
6.0
D
8.0
Question 47Single Answer
Henderson-Hasselbalch equation applies to?
A
Both acidic and basic buffers
B
Only acidic buffers
C
Only basic buffers
D
Strong acids
Question 48Single Answer
pH of solution decreases when?
A
Strong acid added
B
Strong base added
C
Salt added
D
Solvent added
Question 49Single Answer
pH of solution increases when?
A
Strong base added
B
Strong acid added
C
Salt added
D
Water added
Question 50Single Answer
Effective buffer contains?
A
Weak acid and conjugate base
B
Strong acid and strong base
C
Water only
D
Non-electrolyte only
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Concerned Subject (Chemistry)
Question 51Single Answer
Acidic buffer neutralizes?
A
Added base
B
Added acid
C
Salt
D
Water
Question 52Single Answer
Basic buffer neutralizes?
A
Added acid
B
Added base
C
Salt
D
Water
Question 53Single Answer
Buffers resist pH change because?
A
Equilibrium shifts
B
Color change
C
Density change
D
Temperature change
Question 54Single Answer
Buffer capacity is maximum when?
A
[Acid] = [Conjugate base]
B
[Acid] >> [Base]
C
[Base] >> [Acid]
D
Dilute solution
Question 55Single Answer
Buffers are used in?
A
Biological systems and analytical chemistry
B
Nuclear reactions
C
Electroplating
D
Paints
Question 56Single Answer
Buffer solution is important in?
A
Pharmaceuticals
B
Construction
C
Paint industry
D
Plastic industry
Question 57Single Answer
pH of buffer depends on?
A
Ratio of [salt]/[acid]
B
Temperature only
C
Pressure only
D
Density
Question 58Single Answer
Buffer solution prevents?
A
Large pH fluctuations
B
Temperature changes
C
Color change
D
Pressure changes
Question 59Single Answer
Acidic buffer resists?
A
Added base
B
Added acid
C
Water addition
D
Temperature change
Question 60Single Answer
Basic buffer resists?
A
Added acid
B
Added base
C
Temperature change
D
Pressure change
Question 61Single Answer
Buffer solution prepared by?
A
Mixing weak acid and its salt
B
Strong acid and strong base
C
Non-electrolyte
D
Water only
Question 62Single Answer
Buffer solution maintains?
A
Constant pH
B
Constant pressure
C
Constant color
D
Constant density
Question 63Single Answer
Catalysis is defined as?
A
Increase in reaction rate by a substance that is not consumed
B
Decrease in reaction rate
C
Change in equilibrium constant
D
Production of heat
Question 64Single Answer
Substance that increases reaction rate without being consumed is called?
A
Catalyst
B
Inhibitor
C
Reactant
D
Solvent
Question 65Single Answer
Homogeneous catalysis occurs when?
A
Catalyst and reactants are in same phase
B
Catalyst and reactants in different phase
C
Catalyst solid only
D
Reactant gaseous only
Question 66Single Answer
Heterogeneous catalysis occurs when?
A
Catalyst and reactants in different phases
B
Same phase
C
Catalyst gas only
D
Reactant liquid only
Question 67Single Answer
Enzyme catalysis is?
A
Biological catalyst
B
Heterogeneous catalyst
C
Homogeneous catalyst
D
Inhibitor
Question 68Single Answer
Positive catalysis?
A
Increases reaction rate
B
Decreases reaction rate
C
No effect
D
Changes equilibrium
Question 69Single Answer
Negative catalysis?
A
Decreases reaction rate
B
Increases reaction rate
C
No effect
D
Changes equilibrium
Question 70Single Answer
Promoter in catalysis?
A
Enhances catalytic activity
B
Decreases activity
C
Inhibits reaction
D
Reactant
Question 71Single Answer
Catalyst poison?
A
Deactivates catalyst
B
Enhances activity
C
Reactant
D
Solvent
Question 72Single Answer
Enzymes are?
A
Highly specific catalysts
B
Non-specific
C
Inhibitors
D
Solvents
Question 73Single Answer
Autocatalysis occurs when?
A
Product of reaction acts as catalyst
B
Reactant acts as catalyst
C
Solvent acts as catalyst
D
None
Question 74Single Answer
Catalysis lowers?
A
Activation energy
B
Reaction enthalpy
C
Equilibrium constant
D
Solubility
Question 75Single Answer
Heterogeneous catalysis example?
A
Hydrogenation of ethene over Pd
B
Acid-catalyzed esterification
C
Enzyme catalysis
D
None
Question 76Single Answer
Activation energy in presence of catalyst?
A
Decreases
B
Increases
C
Same
D
Zero
Question 77Single Answer
Michaelis-Menten kinetics applies to?
A
Enzyme-catalyzed reactions
B
Heterogeneous catalysis
C
Homogeneous catalysis
D
None
Question 78Single Answer
Turnover number (TON) of catalyst?
A
Number of reactant molecules converted per catalyst molecule
