Undergraduate MCQ & Objective Questions
The undergraduate level is a crucial phase in a student's academic journey, especially for those preparing for school and competitive exams. Mastering this stage can significantly enhance your understanding and retention of key concepts. Practicing MCQs and objective questions is essential, as it not only helps in reinforcing knowledge but also boosts your confidence in tackling important questions during exams.
What You Will Practise Here
Fundamental concepts in Mathematics and Science
Key definitions and theories across various subjects
Important formulas and their applications
Diagrams and graphical representations
Critical thinking and problem-solving techniques
Subject-specific MCQs designed for competitive exams
Revision of essential topics for better retention
Exam Relevance
Undergraduate topics are integral to various examinations such as CBSE, State Boards, NEET, and JEE. These subjects often feature a mix of conceptual and application-based questions. Common patterns include multiple-choice questions that assess both theoretical knowledge and practical application, making it vital for students to be well-versed in undergraduate concepts.
Common Mistakes Students Make
Overlooking the importance of understanding concepts rather than rote memorization
Misinterpreting questions due to lack of careful reading
Neglecting to practice numerical problems that require application of formulas
Failing to review mistakes made in previous practice tests
FAQs
Question: What are some effective strategies for solving undergraduate MCQ questions?Answer: Focus on understanding the concepts, practice regularly, and review your answers to learn from mistakes.
Question: How can I improve my speed in answering objective questions?Answer: Time yourself while practicing and gradually increase the number of questions you attempt in a set time.
Start your journey towards mastering undergraduate subjects today! Solve practice MCQs and test your understanding to ensure you are well-prepared for your exams. Your success is just a question away!
Q. What is the pH of a buffer solution made from 0.1 M acetic acid and 0.1 M sodium acetate? (2023)
A.
4.74
B.
5.00
C.
5.74
D.
6.00
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Solution
Using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]) = 4.74 + log(1) = 4.74.
Correct Answer:
A
— 4.74
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Q. What is the pH of a neutral solution at 25°C? (2023) 2023
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Solution
At 25°C, the pH of a neutral solution is 7.
Correct Answer:
B
— 7
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Q. What is the pH of a solution formed by mixing 25 mL of 0.1 M HCl with 25 mL of 0.1 M NaOH? (2020) 2020
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Solution
HCl and NaOH neutralize each other, resulting in a neutral solution with pH = 7.
Correct Answer:
A
— 7
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Q. What is the pH of a solution that is 0.01 M in both HCl and NaOH?
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Solution
HCl and NaOH neutralize each other, resulting in a neutral solution with pH = 7.
Correct Answer:
C
— 7
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Q. What is the pH of a solution when 0.1 M of Na2CO3 is dissolved in water? (2023)
A.
10.3
B.
11.0
C.
11.5
D.
12.0
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Solution
Na2CO3 is a salt of a weak acid (H2CO3) and a strong base (NaOH). The pH can be estimated using the hydrolysis of CO3^2- which gives a pH around 11.0.
Correct Answer:
B
— 11.0
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Q. What is the pH of a solution with 0.01 M of a weak acid with a Ka of 1.0 x 10^-5? (2023) 2023
A.
4.00
B.
5.00
C.
3.00
D.
6.00
Show solution
Solution
Using the formula for weak acids, pH = 0.5(pKa - logC) = 0.5(4.00 - log(0.01)) = 5.00.
Correct Answer:
B
— 5.00
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Q. What is the pH of a solution with a hydrogen ion concentration of 0.001 M? (2022)
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Solution
pH = -log[H+]. pH = -log(0.001) = 3.
Correct Answer:
A
— 3
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Q. What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-3 M? (2019)
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Solution
pH = -log[H+] = -log(1 x 10^-3) = 3.
Correct Answer:
B
— 3
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Q. What is the pH of a solution with [H+] = 0.00001 M?
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Solution
pH = -log(0.00001) = 5.
Correct Answer:
B
— 6
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Q. What is the pH of a solution with [H+] = 1 x 10^-7 M? (2023)
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Solution
pH = -log[H+] = -log(1 x 10^-7) = 7.
Correct Answer:
A
— 7
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Q. What is the pH range of normal human urine? (2022)
A.
4.5 - 5.5
B.
6.0 - 7.0
C.
7.5 - 8.0
D.
8.5 - 9.0
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Solution
Normal human urine typically has a pH range of 6.0 to 7.0, which can vary based on diet and health.
Correct Answer:
B
— 6.0 - 7.0
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Q. What is the phase angle in a circuit with a resistance of 30 ohms and a reactance of 40 ohms? (2021)
A.
53.13°
B.
36.87°
C.
45°
D.
60°
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Solution
θ = tan⁻¹(X/R) = tan⁻¹(40/30) = 53.13°.
Correct Answer:
A
— 53.13°
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Q. What is the phase difference between the voltage and current in a purely resistive AC circuit? (2021)
A.
0°
B.
45°
C.
90°
D.
180°
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Solution
In a purely resistive circuit, the voltage and current are in phase, so the phase difference is 0°.
Correct Answer:
A
— 0°
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Q. What is the phase difference between the voltage and current in a resistive AC circuit? (2021)
A.
0°
B.
45°
C.
90°
D.
180°
Show solution
Solution
In a purely resistive circuit, the voltage and current are in phase, so the phase difference is 0°.
Correct Answer:
A
— 0°
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Q. What is the phase difference between the voltage and current in a series RLC circuit at resonance? (2023)
A.
0°
B.
90°
C.
180°
D.
45°
Show solution
Solution
At resonance in a series RLC circuit, the phase difference between voltage and current is 0°.
Correct Answer:
A
— 0°
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Q. What is the phase difference between two particles executing simple harmonic motion in the same direction with the same amplitude and frequency? (2023)
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Solution
If two particles are executing simple harmonic motion in the same direction with the same amplitude and frequency, their phase difference is 0.
Correct Answer:
A
— 0
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Q. What is the phase difference between two particles executing simple harmonic motion in phase? (2021)
A.
0 radians
B.
π/2 radians
C.
π radians
D.
3π/2 radians
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Solution
In phase means the phase difference is 0 radians.
Correct Answer:
A
— 0 radians
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Q. What is the phase difference between two particles executing simple harmonic motion in the same direction with the same frequency? (2021)
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Solution
If they have the same frequency and direction, the phase difference is 0.
Correct Answer:
A
— 0
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Q. What is the phase difference between two particles in a wave that are 1/4 wavelength apart? (2019)
A.
0 rad
B.
π/2 rad
C.
π rad
D.
3π/2 rad
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Solution
Phase difference (Δφ) = 2π × (distance / wavelength) = 2π × (1/4) = π/2 rad.
Correct Answer:
B
— π/2 rad
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Q. What is the phase difference between two particles in the same medium oscillating in phase? (2023)
A.
0 radians
B.
π/2 radians
C.
π radians
D.
2π radians
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Solution
If two particles are in phase, the phase difference is 0 radians.
Correct Answer:
A
— 0 radians
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Q. What is the phase difference between two particles in the same phase of oscillation? (2022)
A.
0 radians
B.
π/2 radians
C.
π radians
D.
2π radians
Show solution
Solution
The phase difference between two particles in the same phase of oscillation is 0 radians.
Correct Answer:
A
— 0 radians
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Q. What is the phase difference between two particles in the same wave at a distance of half a wavelength? (2022)
A.
0 radians
B.
π/2 radians
C.
π radians
D.
3π/2 radians
Show solution
Solution
The phase difference between two points separated by half a wavelength is π radians.
Correct Answer:
C
— π radians
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Q. What is the phase difference between two points on a wave that are 1/4 of a wavelength apart? (2021)
A.
0 rad
B.
π/2 rad
C.
π rad
D.
3π/2 rad
Show solution
Solution
The phase difference Δφ is given by Δφ = (2π/λ) * Δx. For Δx = λ/4, Δφ = (2π/λ) * (λ/4) = π/2 rad.
Correct Answer:
B
— π/2 rad
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Q. What is the phase of the cell cycle where DNA is replicated? (2020)
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
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Solution
The S phase (Synthesis phase) is where DNA replication occurs, resulting in the duplication of chromosomes.
Correct Answer:
B
— S phase
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Q. What is the phase of the cell cycle where the cell grows and prepares for mitosis? (2020)
A.
G1 phase
B.
S phase
C.
G2 phase
D.
M phase
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Solution
The G1 phase is the first stage of interphase where the cell grows and prepares for DNA replication.
Correct Answer:
A
— G1 phase
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Q. What is the phenomenon called when light bends as it passes from one medium to another? (2020)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Dispersion
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Solution
Refraction is the bending of light as it passes from one medium to another due to a change in its speed.
Correct Answer:
B
— Refraction
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Q. What is the phenomenon called when one gene affects the expression of another gene? (2022)
A.
Epistasis
B.
Pleiotropy
C.
Codominance
D.
Incomplete dominance
Show solution
Solution
The phenomenon where one gene affects the expression of another gene is called epistasis.
Correct Answer:
A
— Epistasis
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Q. What is the phenomenon of bending of light called? (2023)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Dispersion
Show solution
Solution
The bending of light as it passes from one medium to another is called refraction.
Correct Answer:
B
— Refraction
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Q. What is the phenomenon of bending of light when it passes from one medium to another called? (2015)
A.
Reflection
B.
Refraction
C.
Diffraction
D.
Dispersion
Show solution
Solution
The bending of light when it passes from one medium to another is called refraction.
Correct Answer:
B
— Refraction
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Q. What is the pKa of acetic acid?
A.
4.76
B.
5.76
C.
3.76
D.
6.76
Show solution
Solution
The pKa of acetic acid is approximately 4.76.
Correct Answer:
A
— 4.76
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