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 total resistance in a circuit with a 10Ω resistor in series with a 20Ω resistor? (2022)
A.
10Ω
B.
20Ω
C.
30Ω
D.
15Ω
Show solution
Solution
In series, R_eq = R1 + R2 = 10Ω + 20Ω = 30Ω.
Correct Answer:
C
— 30Ω
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Q. What is the total resistance in a circuit with a 4Ω and a 6Ω resistor in series? (2022)
A.
10Ω
B.
24Ω
C.
2.4Ω
D.
1.5Ω
Show solution
Solution
In series, R_total = R1 + R2 = 4Ω + 6Ω = 10Ω.
Correct Answer:
A
— 10Ω
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Q. What is the total resistance in a series circuit with resistors of 2Ω, 3Ω, and 5Ω?
Show solution
Solution
In a series circuit, total resistance (R_total) is the sum of individual resistances: R_total = R1 + R2 + R3 = 2Ω + 3Ω + 5Ω = 10Ω.
Correct Answer:
A
— 10Ω
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Q. What is the total resistance of two 4Ω resistors connected in series? (2020)
Show solution
Solution
In series, R_eq = R1 + R2 = 4Ω + 4Ω = 8Ω.
Correct Answer:
B
— 8Ω
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Q. What is the total resistance of two resistors of 4Ω and 6Ω connected in parallel? (2021)
A.
2.4Ω
B.
10Ω
C.
24Ω
D.
1.5Ω
Show solution
Solution
For parallel resistors, 1/R_eq = 1/R1 + 1/R2 = 1/4 + 1/6. Finding a common denominator gives R_eq = 2.4Ω.
Correct Answer:
A
— 2.4Ω
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Q. What is the total resistance of two resistors, 4 ohms and 6 ohms, connected in series? (2021)
A.
10 ohms
B.
24 ohms
C.
2.4 ohms
D.
0.67 ohms
Show solution
Solution
In series, total resistance R = R1 + R2 = 4 Ω + 6 Ω = 10 Ω.
Correct Answer:
A
— 10 ohms
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Q. What is the trend in atomic radius as you move down the alkali metal group? (2022)
A.
Increases
B.
Decreases
C.
Remains constant
D.
Increases then decreases
Show solution
Solution
The atomic radius increases as you move down the alkali metal group due to the addition of electron shells.
Correct Answer:
A
— Increases
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Q. What is the trend in reactivity of alkali metals down the group? (2022)
A.
Increases
B.
Decreases
C.
Remains constant
D.
Varies irregularly
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Solution
The reactivity of alkali metals increases down the group due to the decrease in ionization energy.
Correct Answer:
A
— Increases
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Q. What is the Tyndall effect? (2023)
A.
Scattering of light by particles
B.
Absorption of light by particles
C.
Reflection of light by particles
D.
Refraction of light by particles
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Solution
The Tyndall effect is the scattering of light by colloidal particles, making the path of the light visible.
Correct Answer:
A
— Scattering of light by particles
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Q. What is the typical current-voltage characteristic of a diode in reverse bias? (2019)
A.
Linear
B.
Exponential
C.
Constant
D.
Very small reverse saturation current
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Solution
In reverse bias, a diode exhibits a very small reverse saturation current until breakdown occurs.
Correct Answer:
D
— Very small reverse saturation current
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Q. What is the typical forward voltage drop across a silicon diode? (2023)
A.
0.2 V
B.
0.7 V
C.
1.5 V
D.
2.0 V
Show solution
Solution
The typical forward voltage drop across a silicon diode is approximately 0.7 V.
Correct Answer:
B
— 0.7 V
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Q. What is the unit cell of a diamond structure? (2022)
A.
Face-centered cubic
B.
Body-centered cubic
C.
Simple cubic
D.
Hexagonal
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Solution
The diamond structure is based on a face-centered cubic (FCC) unit cell with a specific arrangement of carbon atoms.
Correct Answer:
A
— Face-centered cubic
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Q. What is the unit cell of diamond classified as? (2022)
A.
Simple cubic
B.
Face-centered cubic
C.
Body-centered cubic
D.
Cubic close-packed
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Solution
The diamond structure is classified as a face-centered cubic (FCC) lattice with a basis of two carbon atoms.
Correct Answer:
B
— Face-centered cubic
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Q. What is the unit cell of diamond? (2022)
A.
Face-centered cubic
B.
Body-centered cubic
C.
Simple cubic
D.
Hexagonal
Show solution
Solution
Diamond has a face-centered cubic (FCC) structure with a complex arrangement of carbon atoms.
Correct Answer:
A
— Face-centered cubic
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Q. What is the unit of electric charge in the SI system? (2019)
A.
Coulomb
B.
Ampere
C.
Volt
D.
Ohm
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Solution
The unit of electric charge is Coulomb (C).
Correct Answer:
A
— Coulomb
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Q. What is the unit of electrical conductivity? (2023)
A.
Ohm
B.
Siemens
C.
Volt
D.
Ampere
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Solution
The unit of electrical conductivity is Siemens (S).
Correct Answer:
B
— Siemens
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Q. What is the unit of energy in the SI system? (2023)
A.
Joule
B.
Watt
C.
Newton
D.
Pascal
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Solution
The SI unit of energy is the Joule (J).
Correct Answer:
A
— Joule
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Q. What is the unit of inductive reactance? (2020)
A.
Ohm
B.
Henry
C.
Farad
D.
Tesla
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Solution
Inductive reactance (X_L) is measured in Ohms (Ω), which is the same unit used for resistance.
Correct Answer:
A
— Ohm
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Q. What is the unit of magnetic moment? (2023)
A.
Ampere-meter
B.
Tesla
C.
Weber
D.
Newton-meter
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Solution
The unit of magnetic moment is Ampere-meter (A·m²).
Correct Answer:
A
— Ampere-meter
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Q. What is the unit of measurement for electric current in the SI system? (2022)
A.
Volt
B.
Ampere
C.
Ohm
D.
Coulomb
Show solution
Solution
The SI unit of electric current is the Ampere (A).
Correct Answer:
B
— Ampere
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Q. What is the unit of measurement for electric current? (2019)
A.
Volt
B.
Ohm
C.
Ampere
D.
Watt
Show solution
Solution
The SI unit of electric current is the Ampere (A).
Correct Answer:
C
— Ampere
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Q. What is the unit of pressure in SI units? (2023)
A.
Pascal
B.
Bar
C.
Atmosphere
D.
Torr
Show solution
Solution
The SI unit of pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer:
A
— Pascal
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Q. What is the unit of pressure in SI? (2023)
A.
Pascal
B.
Bar
C.
Atmosphere
D.
Torr
Show solution
Solution
The SI unit of pressure is Pascal (Pa), which is equivalent to N/m².
Correct Answer:
A
— Pascal
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Q. What is the unit of the gas constant R in the ideal gas law? (2023)
A.
L·atm/(K·mol)
B.
J/(K·mol)
C.
L·K/(mol·s)
D.
atm/(K·mol)
Show solution
Solution
The gas constant R is commonly expressed in the unit L·atm/(K·mol).
Correct Answer:
A
— L·atm/(K·mol)
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Q. What is the unit of the rate constant for a first-order reaction? (2023)
A.
M/s
B.
M²/s
C.
s⁻¹
D.
M⁻¹s⁻¹
Show solution
Solution
The unit of the rate constant for a first-order reaction is s⁻¹.
Correct Answer:
C
— s⁻¹
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Q. What is the unit of work in the SI system? (2023)
A.
Joule
B.
Newton
C.
Watt
D.
Pascal
Show solution
Solution
The SI unit of work is Joule (J).
Correct Answer:
A
— Joule
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Q. What is the valency of Magnesium? (2015)
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Solution
Magnesium has a valency of 2, as it can lose two electrons.
Correct Answer:
B
— 2
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Q. What is the valency of Oxygen? (2021)
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Solution
Oxygen has a valency of 2, as it needs two electrons to complete its outer shell.
Correct Answer:
B
— 2
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Q. What is the value of (1 + i)(1 - i)? (2019)
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Solution
(1 + i)(1 - i) = 1^2 - i^2 = 1 - (-1) = 1 + 1 = 2.
Correct Answer:
A
— 2
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Q. What is the value of (2 + 3) × (4 - 1)? (2023)
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Solution
Using BODMAS: (2 + 3) = 5 and (4 - 1) = 3, so 5 × 3 = 15.
Correct Answer:
C
— 10
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