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Physical Chemistry MCQs

Prepare thoroughly for exams with our carefully structured Physical Chemistry MCQs, designed for chemistry students and aspirants of science-related job tests. These multiple-choice questions cover important topics such as thermodynamics, chemical kinetics, atomic structure, gas laws, quantum chemistry, equilibrium, colligative properties, electrochemistry, phase rule, and thermochemistry. These questions are frequently included in tests conducted by PPSC, FPSC, CSS, NTS, SPSC, BPSC, KPSC, ETEA, AJKPSC, and are highly relevant for Lecturer Chemistry, lab analyst posts, and university-level exams (BSc, MSc Chemistry).

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1 Physical Chemistry MCQs

Species that are formed in one step of a reaction mechanism and used up in another step are called:

  • Catalyst
  • Intermediate
  • Inhibitor
  • Activated complex
0 Comments
Correct Answer: B. Intermediate

Explanation:

In chemical kinetics, a reaction mechanism is the step-by-step sequence of elementary reactions ... Read More Details

2 Physical Chemistry MCQs

Which of the following is a non-crystalline solid pair?

  • Diamond, wood
  • Glass, table salt
  • Wood, glass
  • Sucrose, glass
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Correct Answer: C. Wood, glass

Explanation:

Solids are broadly classified into crystalline and non-crystalline (amorphous) solids. Crystalline solids have ... Read More Details

3 Physical Chemistry MCQs

The size of colloidal particles is:

  • Greater than true solution
  • Greater than suspension
  • In between true solution and suspension
  • All of these
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Correct Answer: C. In between true solution and suspension

Explanation:

Colloids represent a unique state of matter that lies between true solutions and ... Read More Details

4 Physical Chemistry MCQs

Oobleck is a mixture of which two substances?

  • Gram flour and water
  • Baking soda and vinegar
  • Cement and water
  • Cornstarch and water
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Correct Answer: D. Cornstarch and water

Explanation:

Oobleck is a non-Newtonian fluid, meaning it behaves differently under stress or pressure. ... Read More Details

5 Physical Chemistry MCQs

Which process occurs when no heat enters or leaves the system?

  • Isochoric
  • Isobaric
  • Adiabatic
  • Isothermal
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Correct Answer: C. Adiabatic

Explanation:

In thermodynamics, processes are classified based on how energy and work are exchanged ... Read More Details

6 Physical Chemistry MCQs

Which system can exchange both matter and energy with its surroundings?

  • Open system
  • Closed system
  • Isolated system
  • Inert system
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Correct Answer: A. Open system

Explanation:

In thermodynamics, systems are classified based on how they interact with their surroundings. ... Read More Details

7 Physical Chemistry MCQs

Which properties do not depend on the mass of a substance?

  • Extensive properties
  • Colligative properties
  • Intensive properties
  • None of these
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Correct Answer: C. Intensive properties

Explanation:

Properties of matter are classified into intensive and extensive properties based on whether ... Read More Details

8 Physical Chemistry MCQs

Which system exchanges only energy with its surroundings?

  • Open system
  • Closed system
  • Isolated system
  • None of the above
0 Comments
Correct Answer: B. Closed system

Explanation:

In thermodynamics, systems are classified based on their ability to exchange matter and ... Read More Details

9 Physical Chemistry MCQs

In isothermal process?

  • No heat enter or leave the system
  • Pressure of the system remains constant
  • Temperature of the system remains constant
  • Volume of the system remains unchanged
0 Comments
Correct Answer: C. Temperature of the system remains constant

Explanation:

An isothermal process is a type of thermodynamic process in which the temperature ... Read More Details

10 Physical Chemistry MCQs

Greater the heat of neutralization the acid will be ?

  • More stronger
  • More weaker
  • Not related to acid strength
  • None of these
0 Comments
Correct Answer: A. More stronger

Explanation:

The heat of neutralization is the heat released when an acid reacts with ... Read More Details

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