Q. Which of the following is a characteristic of chemisorption?
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A.
Reversible process
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B.
Low heat of adsorption
-
C.
Specificity to adsorbate
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D.
Occurs at low temperatures
Solution
Chemisorption is characterized by its specificity to adsorbate due to the formation of chemical bonds.
Correct Answer: C — Specificity to adsorbate
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Q. Which of the following is a characteristic of non-Newtonian fluids?
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A.
Constant viscosity
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B.
Viscosity changes with shear rate
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C.
Incompressible
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D.
High surface tension
Solution
Non-Newtonian fluids exhibit a change in viscosity with the rate of shear applied.
Correct Answer: B — Viscosity changes with shear rate
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Q. Which of the following is a characteristic of solids?
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A.
They can flow
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B.
They have a definite shape
-
C.
They are compressible
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D.
They have high kinetic energy
Solution
Solids have a definite shape and are not compressible; they do not flow like liquids or gases.
Correct Answer: B — They have a definite shape
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Q. Which of the following is a colligative property?
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A.
Boiling point elevation
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B.
Density
-
C.
Viscosity
-
D.
Color
Solution
Boiling point elevation is a colligative property that depends on the number of solute particles in a solution.
Correct Answer: A — Boiling point elevation
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Q. Which of the following is a common application of adsorption?
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A.
Catalysis
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B.
Separation of gases
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C.
Water purification
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D.
All of the above
Solution
Adsorption is widely used in catalysis, gas separation, and water purification processes.
Correct Answer: D — All of the above
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Q. Which of the following is a common method to measure the surface area of adsorbents?
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A.
TGA
-
B.
BET method
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C.
XRD
-
D.
FTIR
Solution
The BET method (Brunauer-Emmett-Teller) is commonly used to measure the surface area of adsorbents.
Correct Answer: B — BET method
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Q. Which of the following is a common method to measure the surface area of an adsorbent?
-
A.
TGA
-
B.
BET method
-
C.
XRD
-
D.
FTIR
Solution
The BET method (Brunauer-Emmett-Teller) is commonly used to measure the surface area of adsorbents.
Correct Answer: B — BET method
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Q. Which of the following is a common oxidizing agent?
-
A.
H2O2
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B.
NaCl
-
C.
CH4
-
D.
C6H12O6
Solution
Hydrogen peroxide (H2O2) is a well-known oxidizing agent.
Correct Answer: A — H2O2
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Q. Which of the following is a consequence of Raoult's Law in a binary solution?
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A.
The total vapor pressure is the sum of the partial pressures.
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B.
The total vapor pressure is always lower than the vapor pressure of the pure solvent.
-
C.
The mole fraction of the solute is always greater than that of the solvent.
-
D.
The boiling point of the solution is always higher than that of the pure solvent.
Solution
According to Raoult's Law, the total vapor pressure of a binary solution is the sum of the partial pressures of each component.
Correct Answer: A — The total vapor pressure is the sum of the partial pressures.
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Q. Which of the following is a correct application of Raoult's Law?
-
A.
Calculating the boiling point elevation
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B.
Determining the freezing point depression
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C.
Finding the vapor pressure of a solution
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D.
Measuring the solubility of a gas in a liquid
Solution
Raoult's Law is used to find the vapor pressure of a solution based on the vapor pressures of its components.
Correct Answer: C — Finding the vapor pressure of a solution
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Q. Which of the following is a correct expression for Gibbs Free Energy?
-
A.
ΔG = ΔH + TΔS
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B.
ΔG = ΔH - TΔS
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C.
ΔG = TΔS - ΔH
-
D.
ΔG = ΔS - ΔH
Solution
The correct expression for Gibbs Free Energy is ΔG = ΔH - TΔS.
Correct Answer: B — ΔG = ΔH - TΔS
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Q. Which of the following is a correct statement about the law of conservation of mass?
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A.
Mass can be created
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B.
Mass can be destroyed
-
C.
Mass is conserved in a chemical reaction
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D.
Mass changes in a physical change
Solution
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.
Correct Answer: C — Mass is conserved in a chemical reaction
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Q. Which of the following is a correct unit for concentration?
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A.
Molarity
-
B.
Molality
-
C.
Mass percent
-
D.
All of the above
Solution
All listed options are valid units for concentration.
Correct Answer: D — All of the above
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Q. Which of the following is a correct unit for Gibbs Free Energy?
-
A.
Joules per mole (J/mol)
-
B.
Kilojoules (kJ)
-
C.
Calories (cal)
-
D.
All of the above
Solution
Gibbs Free Energy can be expressed in various units, including Joules per mole, kilojoules, and calories.
Correct Answer: D — All of the above
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Q. Which of the following is a correct unit for molality?
-
A.
mol/L
-
B.
mol/kg
-
C.
mol/mL
-
D.
mol/1000g
Solution
Molality is defined as moles of solute per kilogram of solvent, hence the unit is mol/kg.
Correct Answer: B — mol/kg
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Q. Which of the following is a limitation of Raoult's Law?
-
A.
It applies to all solutions.
-
B.
It is valid for ideal solutions only.
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C.
It does not consider temperature effects.
-
D.
It is applicable to non-volatile solutes only.
Solution
Raoult's Law is primarily valid for ideal solutions, where the interactions between molecules are similar to those in the pure components.
Correct Answer: B — It is valid for ideal solutions only.
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Q. Which of the following is a primary cell?
-
A.
Lead-acid battery
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B.
Nickel-cadmium battery
-
C.
Zinc-carbon battery
-
D.
Lithium-ion battery
Solution
The zinc-carbon battery is a primary cell, while the others are secondary cells.
Correct Answer: C — Zinc-carbon battery
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Q. Which of the following is a property of metals?
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A.
Brittle
-
B.
Good conductors of heat
-
C.
Poor conductors of electricity
-
D.
Dull appearance
Solution
Metals are typically good conductors of heat and electricity and have a shiny appearance.
Correct Answer: B — Good conductors of heat
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Q. Which of the following is a reducing agent in the reaction 2CuO + C → 2Cu + CO2?
Solution
C is the reducing agent as it donates electrons to reduce CuO to Cu.
Correct Answer: B — C
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Q. Which of the following is a state function?
-
A.
Work
-
B.
Heat
-
C.
Enthalpy
-
D.
All of the above
Solution
Enthalpy is a state function, while work and heat are not state functions as they depend on the path taken.
Correct Answer: C — Enthalpy
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Q. Which of the following is a strong acid?
-
A.
HCl
-
B.
CH3COOH
-
C.
H2CO3
-
D.
NH3
Solution
HCl (hydrochloric acid) is a strong acid that completely dissociates in water.
Correct Answer: A — HCl
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Q. Which of the following is a strong base?
-
A.
NH4OH
-
B.
NaOH
-
C.
CH3COONa
-
D.
K2CO3
Solution
NaOH (sodium hydroxide) is a strong base that completely dissociates in solution.
Correct Answer: B — NaOH
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Q. Which of the following is a unit of concentration that expresses the amount of solute per volume of solution?
-
A.
Molarity
-
B.
Molality
-
C.
Mole fraction
-
D.
Normality
Solution
Molarity is defined as moles of solute per liter of solution.
Correct Answer: A — Molarity
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Q. Which of the following is a unit of enthalpy?
-
A.
Joules
-
B.
Calories
-
C.
Kilojoules
-
D.
All of the above
Solution
Enthalpy can be expressed in Joules, Calories, and Kilojoules.
Correct Answer: D — All of the above
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Q. Which of the following is a unit of pressure?
-
A.
Pascal
-
B.
Joule
-
C.
Coulomb
-
D.
Liter
Solution
Pascal (Pa) is the SI unit of pressure, defined as one newton per square meter.
Correct Answer: A — Pascal
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Q. Which of the following is an example of a chemical change?
-
A.
Melting ice
-
B.
Boiling water
-
C.
Baking a cake
-
D.
Dissolving salt in water
Solution
Baking a cake is a chemical change as it results in the formation of new substances.
Correct Answer: C — Baking a cake
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Q. Which of the following is an example of a crystalline solid?
-
A.
Sugar
-
B.
Glass
-
C.
Rubber
-
D.
Plastic
Solution
Sugar is an example of a crystalline solid, characterized by a well-ordered structure.
Correct Answer: A — Sugar
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Q. Which of the following is an example of a disproportionation reaction?
-
A.
2H2O2 → 2H2O + O2
-
B.
Zn + CuSO4 → ZnSO4 + Cu
-
C.
2Na + Cl2 → 2NaCl
-
D.
C + O2 → CO2
Solution
In the reaction 2H2O2 → 2H2O + O2, hydrogen peroxide is both oxidized and reduced.
Correct Answer: A — 2H2O2 → 2H2O + O2
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Q. Which of the following is an example of a physical adsorption?
-
A.
Adsorption of O2 on activated charcoal
-
B.
Adsorption of H2 on palladium
-
C.
Adsorption of NH3 on silica gel
-
D.
Adsorption of CO on metals
Solution
The adsorption of O2 on activated charcoal is an example of physical adsorption.
Correct Answer: A — Adsorption of O2 on activated charcoal
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Q. Which of the following is an example of a physical change related to states of matter?
-
A.
Burning wood
-
B.
Dissolving sugar in water
-
C.
Rusting of iron
-
D.
Cooking an egg
Solution
Dissolving sugar in water is a physical change as it does not alter the chemical composition.
Correct Answer: B — Dissolving sugar in water
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