NDA MCQ & Objective Questions
The National Defence Academy (NDA) exam is a crucial stepping stone for students aspiring to join the Indian Armed Forces. It tests not only knowledge but also the ability to apply concepts effectively. Practicing NDA MCQs and objective questions is essential for enhancing your exam preparation, as it helps in identifying important questions and boosts confidence in tackling various subjects.
What You Will Practise Here
Mathematics: Key concepts, formulas, and problem-solving techniques.
General Knowledge: Current affairs, history, and geography relevant to NDA.
English: Grammar, comprehension, and vocabulary exercises.
Physics: Fundamental principles and application-based questions.
Chemistry: Important definitions, reactions, and theoretical concepts.
Logical Reasoning: Techniques for solving puzzles and analytical questions.
Military History: Significant events and figures in Indian military history.
Exam Relevance
The NDA exam is not only significant for aspiring defence candidates but also aligns with various school and competitive exams like CBSE, State Boards, NEET, and JEE. Questions often follow a pattern that includes multiple-choice formats, requiring students to apply their knowledge effectively. Understanding the common question types and formats will enhance your readiness for these exams.
Common Mistakes Students Make
Misinterpreting questions due to lack of careful reading.
Overlooking important formulas in Mathematics and Physics.
Confusing similar concepts in Chemistry and General Knowledge.
Neglecting to practice logical reasoning, leading to time management issues.
Failing to revise key definitions and terms in English and other subjects.
FAQs
Question: What are NDA MCQ questions?Answer: NDA MCQ questions are multiple-choice questions designed to test your knowledge and understanding of various subjects relevant to the NDA exam.
Question: How can I prepare for NDA objective questions with answers?Answer: Regular practice of NDA objective questions, along with reviewing answers and explanations, will help solidify your understanding and improve your performance.
Question: What are some important NDA questions for exams?Answer: Important NDA questions often cover key concepts in Mathematics, General Knowledge, English, and Science, focusing on application and analytical skills.
Start your journey towards success by solving NDA practice MCQs today! Testing your understanding through these objective questions will not only prepare you for the exam but also build your confidence to excel.
Q. What is the result of mixing equal volumes of 0.1 M HCl and 0.1 M NaOH?
A.
pH < 7
B.
pH = 7
C.
pH > 7
D.
Cannot be determined
Show solution
Solution
Mixing equal volumes of 0.1 M HCl and 0.1 M NaOH results in a neutral solution with pH = 7.
Correct Answer:
B
— pH = 7
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Q. What is the result of multiplying 2.5 by 3.456, considering significant figures?
A.
8.64
B.
8.6
C.
8.65
D.
8.7
Show solution
Solution
2.5 has 2 significant figures and 3.456 has 4 significant figures. The result should be rounded to 2 significant figures, giving 8.6.
Correct Answer:
B
— 8.6
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Q. What is the role of antioxidants in nutrition? (2022)
A.
Energy production
B.
Cell protection
C.
Muscle growth
D.
Hormone regulation
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Solution
Antioxidants play a role in cell protection by neutralizing free radicals that can cause cellular damage.
Correct Answer:
B
— Cell protection
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Q. What is the role of auxins in plant growth?
A.
Promote flowering
B.
Stimulate root growth
C.
Inhibit growth
D.
Promote cell elongation
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Solution
Auxins are plant hormones that promote cell elongation, which is crucial for growth and development in plants.
Correct Answer:
D
— Promote cell elongation
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Q. What is the role of enzymes in biological reactions? (2023)
A.
Increase temperature
B.
Decrease activation energy
C.
Change the pH
D.
Provide energy
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Solution
Enzymes act as catalysts that lower the activation energy required for biochemical reactions, thus speeding them up.
Correct Answer:
B
— Decrease activation energy
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Q. What is the role of ribosomes in a cell?
A.
Energy production
B.
Protein synthesis
C.
DNA replication
D.
Cell division
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Solution
Ribosomes are the sites of protein synthesis, translating mRNA into polypeptide chains.
Correct Answer:
B
— Protein synthesis
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Q. What is the role of the circulatory system? (2019)
A.
To break down food
B.
To transport nutrients and oxygen
C.
To produce hormones
D.
To protect against diseases
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Solution
The circulatory system's role is to transport nutrients, oxygen, and hormones to cells and remove waste products.
Correct Answer:
B
— To transport nutrients and oxygen
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Q. What is the role of the endoplasmic reticulum?
A.
Energy production
B.
Synthesis of lipids and proteins
C.
Storage of genetic information
D.
Cell division
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Solution
The endoplasmic reticulum is involved in the synthesis of lipids and proteins.
Correct Answer:
B
— Synthesis of lipids and proteins
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Q. What is the role of the Golgi apparatus in the cell?
A.
Energy production
B.
Modification and packaging of proteins
C.
Cell division
D.
Photosynthesis
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Solution
The Golgi apparatus modifies, sorts, and packages proteins for secretion or use within the cell.
Correct Answer:
B
— Modification and packaging of proteins
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Q. What is the role of the respiratory system?
A.
To break down food
B.
To exchange gases
C.
To circulate blood
D.
To protect against pathogens
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Solution
The respiratory system is responsible for the exchange of gases, primarily oxygen and carbon dioxide, between the body and the environment.
Correct Answer:
B
— To exchange gases
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Q. What is the role of xylem in plants?
A.
Transport of nutrients
B.
Transport of water
C.
Photosynthesis
D.
Storage of food
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Solution
Xylem is responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.
Correct Answer:
B
— Transport of water
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Q. What is the scalar product of A = 1i + 2j + 3k and B = 4i + 5j + 6k?
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Solution
A · B = (1)(4) + (2)(5) + (3)(6) = 4 + 10 + 18 = 32.
Correct Answer:
A
— 32
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Q. What is the scalar product of the vectors A = 1i + 2j + 3k and B = 4i + 5j + 6k?
Show solution
Solution
A · B = (1)(4) + (2)(5) + (3)(6) = 4 + 10 + 18 = 32.
Correct Answer:
A
— 32
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Q. What is the scalar projection of vector H = 6i + 8j onto vector I = 3i + 4j?
Show solution
Solution
Scalar projection = (H · I) / |I| = (6*3 + 8*4) / √(3^2 + 4^2) = (18 + 32) / 5 = 50 / 5 = 10.
Correct Answer:
C
— 10
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Q. What is the scalar triple product of vectors A = i + j + k, B = 2i + 3j + k, and C = 3i + j + 2k?
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Solution
Scalar triple product = A · (B × C) = |i j k| |1 1 1| |2 3 1| |3 1 2| = 0.
Correct Answer:
D
— 0
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Q. What is the second derivative of f(x) = 2x^4 - 3x^3 + x?
A.
24x^2 - 18x + 1
B.
24x^2 - 9
C.
12x^2 - 9
D.
8x^3 - 9
Show solution
Solution
First derivative f'(x) = 8x^3 - 9x^2 + 1. Second derivative f''(x) = 24x^2 - 18x.
Correct Answer:
A
— 24x^2 - 18x + 1
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Q. What is the second derivative of f(x) = 2x^4 - 4x^3 + 3?
A.
24x^2 - 24x
B.
12x^2 - 12
C.
24x^3 - 12x^2
D.
8x^2 - 12
Show solution
Solution
First derivative f'(x) = 8x^3 - 12x^2. Second derivative f''(x) = 24x^2 - 24x.
Correct Answer:
A
— 24x^2 - 24x
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Q. What is the second derivative of the function f(x) = 2x^4 - 4x^3 + 3?
A.
24x^2 - 24x
B.
24x^2 - 12
C.
12x^2 - 12
D.
8x^2 - 12
Show solution
Solution
First derivative f'(x) = 8x^3 - 12x^2. Second derivative f''(x) = 24x^2 - 24x.
Correct Answer:
A
— 24x^2 - 24x
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Q. What is the shape of an s orbital? (2023)
A.
Spherical
B.
Dumbbell
C.
Double dumbbell
D.
Linear
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Solution
The s orbital has a spherical shape.
Correct Answer:
A
— Spherical
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Q. What is the significance of August 15 in India?
A.
Constitution Day
B.
Independence Day
C.
Republic Day
D.
Gandhi Jayanti
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Solution
August 15 is celebrated as Independence Day in India.
Correct Answer:
B
— Independence Day
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Q. What is the slope of the line perpendicular to the line 4x - 5y + 10 = 0? (2022)
A.
5/4
B.
-4/5
C.
4/5
D.
-5/4
Show solution
Solution
The slope of the line is 4/5, so the slope of the perpendicular line is -5/4.
Correct Answer:
B
— -4/5
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Q. What is the slope of the line perpendicular to the line 4x - 5y = 10? (2022)
A.
5/4
B.
-4/5
C.
4/5
D.
-5/4
Show solution
Solution
The slope of the line is 4/5, so the slope of the perpendicular line is -5/4.
Correct Answer:
B
— -4/5
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Q. What is the slope of the line represented by the equation 4x - 2y + 8 = 0? (2021)
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Solution
Rearranging gives y = 2x + 4, so slope = 2.
Correct Answer:
C
— -2
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Q. What is the slope of the line represented by the equation y = 2x + 3?
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Solution
The slope of the line in the equation y = mx + b is m, which is 2.
Correct Answer:
B
— 2
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Q. What is the slope of the line represented by the equation y = 3x + 2? (2021)
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Solution
In the equation y = mx + b, m is the slope. Here, m = 3.
Correct Answer:
A
— 3
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Q. What is the slope of the line represented by the equation y = 3x + 4? (2022)
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Solution
The slope of the line in the equation y = mx + b is m. Here, m = 3.
Correct Answer:
A
— 3
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Q. What is the slope of the tangent line to the curve y = x^2 + 2x at x = 1?
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Solution
The derivative y' = 2x + 2. At x = 1, y' = 2(1) + 2 = 4.
Correct Answer:
A
— 3
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Q. What is the slope of the tangent line to the curve y = x^2 at the point (1,1)? (2023)
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Solution
The derivative y' = 2x; At x = 1, slope = 2(1) = 2.
Correct Answer:
B
— 2
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Q. What is the slope of the tangent line to the curve y = x^2 at the point (2, 4)?
Show solution
Solution
The derivative y' = 2x. At x = 2, the slope is y'(2) = 2(2) = 4.
Correct Answer:
A
— 2
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Q. What is the slope of the tangent line to the curve y = x^2 at the point (3, 9)? (2020)
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Solution
The derivative y' = 2x. At x = 3, y' = 2(3) = 6.
Correct Answer:
B
— 6
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