Major Competitive Exams MCQ & Objective Questions
Major Competitive Exams play a crucial role in shaping the academic and professional futures of students in India. These exams not only assess knowledge but also test problem-solving skills and time management. Practicing MCQs and objective questions is essential for scoring better, as they help in familiarizing students with the exam format and identifying important questions that frequently appear in tests.
What You Will Practise Here
Key concepts and theories related to major subjects
Important formulas and their applications
Definitions of critical terms and terminologies
Diagrams and illustrations to enhance understanding
Practice questions that mirror actual exam patterns
Strategies for solving objective questions efficiently
Time management techniques for competitive exams
Exam Relevance
The topics covered under Major Competitive Exams are integral to various examinations such as CBSE, State Boards, NEET, and JEE. Students can expect to encounter a mix of conceptual and application-based questions that require a solid understanding of the subjects. Common question patterns include multiple-choice questions that test both knowledge and analytical skills, making it essential to be well-prepared with practice MCQs.
Common Mistakes Students Make
Rushing through questions without reading them carefully
Overlooking the negative marking scheme in MCQs
Confusing similar concepts or terms
Neglecting to review previous years’ question papers
Failing to manage time effectively during the exam
FAQs
Question: How can I improve my performance in Major Competitive Exams?Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.
Question: What types of questions should I focus on for these exams?Answer: Concentrate on important Major Competitive Exams questions that frequently appear in past papers and mock tests.
Question: Are there specific strategies for tackling objective questions?Answer: Yes, practicing under timed conditions and reviewing mistakes can help develop effective strategies.
Start your journey towards success by solving practice MCQs today! Test your understanding and build confidence for your upcoming exams. Remember, consistent practice is the key to mastering Major Competitive Exams!
Q. What is the pH of a solution formed by mixing equal volumes of 0.1 M HCl and 0.1 M NaOH?
Show solution
Solution
HCl and NaOH neutralize each other completely, resulting in a neutral solution with a pH of 7.
Correct Answer:
A
— 7
Learn More →
Q. What is the pH of a solution that has a hydrogen ion concentration of 1 x 10^-5 M?
Show solution
Solution
pH is calculated as pH = -log[H+]. For [H+] = 1 x 10^-5 M, pH = -log(1 x 10^-5) = 5.
Correct Answer:
A
— 5
Learn More →
Q. What is the pH of a solution that has a hydronium ion concentration of 1 x 10^-5 M?
Show solution
Solution
pH is calculated as pH = -log[H3O+]. For [H3O+] = 1 x 10^-5 M, pH = -log(1 x 10^-5) = 5.
Correct Answer:
A
— 5
Learn More →
Q. What is the pH of a solution that has a hydroxide ion concentration of 1.0 x 10^-3 M?
Show solution
Solution
pOH = -log[OH-] = -log(1.0 x 10^-3) = 3. Therefore, pH = 14 - pOH = 14 - 3 = 11.
Correct Answer:
A
— 11
Learn More →
Q. What is the pH of a solution that has a [H+] concentration of 1 x 10^-7 M?
Show solution
Solution
pH = -log[H+] = -log(1 x 10^-7) = 7.
Correct Answer:
A
— 7
Learn More →
Q. What is the pH of a solution that is 0.01 M in both HCl and NaOH?
Show solution
Solution
HCl and NaOH neutralize each other, resulting in a neutral solution with pH = 7.
Correct Answer:
C
— 7
Learn More →
Q. What is the pH of a solution that is 0.1 M in both acetic acid and sodium acetate?
A.
4.76
B.
5.76
C.
6.76
D.
7.76
Show solution
Solution
Using Henderson-Hasselbalch equation: pH = pKa + log([A-]/[HA]); pKa of acetic acid = 4.76, so pH = 4.76 + log(1) = 4.76
Correct Answer:
A
— 4.76
Learn More →
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
Show solution
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
Learn More →
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
Learn More →
Q. What is the pH of a solution with a hydrogen ion concentration of 0.001 M? (2022)
Show solution
Solution
pH = -log[H+]. pH = -log(0.001) = 3.
Correct Answer:
A
— 3
Learn More →
Q. What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-3 M? (2019)
Show solution
Solution
pH = -log[H+] = -log(1 x 10^-3) = 3.
Correct Answer:
B
— 3
Learn More →
Q. What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-7 M?
Show solution
Solution
pH = -log[H+] = -log(1 x 10^-7) = 7.
Correct Answer:
A
— 7
Learn More →
Q. What is the pH of a solution with a hydroxide ion concentration of 0.001 M?
Show solution
Solution
pOH = -log[OH-] = -log(0.001) = 3; pH = 14 - pOH = 14 - 3 = 11
Correct Answer:
B
— 12
Learn More →
Q. What is the pH of a solution with a hydroxide ion concentration of 1.0 x 10^-4 M?
Show solution
Solution
To find the pH, first calculate pOH = -log[OH-] = 4, then use pH + pOH = 14, so pH = 14 - 4 = 10.
Correct Answer:
A
— 10
Learn More →
Q. What is the pH of a solution with [H+] = 0.00001 M?
Show solution
Solution
pH = -log(0.00001) = 5.
Correct Answer:
B
— 6
Learn More →
Q. What is the pH of a solution with [H+] = 1 x 10^-6 M?
Show solution
Solution
Using the formula pH = -log[H+], we find pH = -log(1 x 10^-6) = 6.
Correct Answer:
A
— 6
Learn More →
Q. What is the pH of a solution with [H+] = 1 x 10^-7 M? (2023)
Show solution
Solution
pH = -log[H+] = -log(1 x 10^-7) = 7.
Correct Answer:
A
— 7
Learn More →
Q. What is the pH range of acidic solutions? (2023)
A.
0-7
B.
7-14
C.
14-20
D.
None of the above
Show solution
Solution
Acidic solutions have a pH range of 0 to 7.
Correct Answer:
A
— 0-7
Learn More →
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
Show solution
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
Learn More →
Q. What is the pH value of a neutral solution? (2020)
Show solution
Solution
A neutral solution has a pH value of 7, which is neither acidic nor basic.
Correct Answer:
B
— 7
Learn More →
Q. What is the pH value of pure water at 25°C?
Show solution
Solution
The pH value of pure water at 25°C is 7, which is neutral.
Correct Answer:
B
— 7
Learn More →
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°
Show solution
Solution
θ = tan⁻¹(X/R) = tan⁻¹(40/30) = 53.13°.
Correct Answer:
A
— 53.13°
Learn More →
Q. What is the phase difference between the displacement and acceleration in simple harmonic motion?
A.
0 degrees
B.
90 degrees
C.
180 degrees
D.
270 degrees
Show solution
Solution
In simple harmonic motion, acceleration is always opposite to displacement, hence the phase difference is 180 degrees.
Correct Answer:
C
— 180 degrees
Learn More →
Q. What is the phase difference between the displacement and acceleration of a particle in simple harmonic motion?
A.
0 degrees
B.
90 degrees
C.
180 degrees
D.
270 degrees
Show solution
Solution
In simple harmonic motion, the acceleration is always directed towards the mean position and is 180 degrees out of phase with the displacement.
Correct Answer:
C
— 180 degrees
Learn More →
Q. What is the phase difference between the displacement and acceleration of a simple harmonic oscillator?
A.
0 degrees
B.
90 degrees
C.
180 degrees
D.
270 degrees
Show solution
Solution
In simple harmonic motion, acceleration is 180 degrees out of phase with displacement.
Correct Answer:
C
— 180 degrees
Learn More →
Q. What is the phase difference between the driving force and the displacement in a forced oscillation at resonance?
A.
0 degrees
B.
90 degrees
C.
180 degrees
D.
270 degrees
Show solution
Solution
At resonance, the phase difference between the driving force and the displacement is 0 degrees.
Correct Answer:
A
— 0 degrees
Learn More →
Q. What is the phase difference between the driving force and the displacement in a damped forced oscillator at resonance?
A.
0°
B.
90°
C.
180°
D.
270°
Show solution
Solution
At resonance, the phase difference is 90°.
Correct Answer:
B
— 90°
Learn More →
Q. What is the phase difference between the driving force and the displacement in a damped oscillator at resonance?
A.
0 degrees
B.
90 degrees
C.
180 degrees
D.
270 degrees
Show solution
Solution
At resonance, the phase difference between the driving force and the displacement is 180 degrees.
Correct Answer:
C
— 180 degrees
Learn More →
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°
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°
Learn More →
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°
Learn More →
Showing 22291 to 22320 of 31669 (1056 Pages)