NTA will shortly release the JEE Main Syllabus 2025 at jeemain.nta.ac.in. Last Year, the complete syllabus of JEE Main underwent some major changes. According to the latest syllabus guidelines, the weightage of Physics has dropped to 22.5%. Due to these changes in the syllabus, certain shifts in chapter-wise weightage have been observed. Principles Related To Practical Chemistry are among such topics. It’s among the least weightage topics in JEE Main Physics Syllabus 2025. This chapter holds 1.39% weightage in the whole syllabus.
- Principles Related To Practical Chemistry is a part of the General Physics section, and every year around 2-3 questions are asked from this chapter. Due to the drop in weightage, you can expect 1-2 questions in JEE Main 2025.
- Principles Related To Practical Chemistry in JEE Mains Physics Syllabus 2025 covers all the basic concepts on units and measurements, fundamentals of units, dimensions etc.
Aspirants consider Principles Related To Practical Chemistry as one of the Easiest Chapters in Physics for JEE Main 2025. Even though this chapter has the least weightage in the syllabus, to develop a strong foundation in physics, this particular chapter plays a pivotal role. Hence the candidates need to develop a clear understanding of this chapter. The list of most asked questions from this chapter will help the students with their preparation.
Must Check News on JEE Main Physics:
Some of the most important topics in the Physics and Measurement chapter for the JEE Main exam include:
- Units and measurements
- Dimensional analysis
- Significant figures
- Errors and uncertainties
- Vernier calipers and screw gauge
- Measurement of length, mass, and time
- Systematic and random errors
- Propagation of errors
- Micrometer screw gauge
- Measurement of temperature
Principles Related To Practical Chemistry JEE Mains Questions -List Of Most Asked Questions With Solutions
In the (JEE) Main, the topic of Physics and Measurement often features questions that have appeared multiple times in previous years. Many questions in this section are either repeated or follow similar patterns, with only minor changes, such as different numerical values or slight modifications in wording.Certain questions have been repeated as many as five times.
Here are some of the most frequently asked and repeated questions:
Here are 10 multiple-choice questions on "Principles Related to Practical Chemistry" along with their solutions and the years they appeared in JEE Mains:
- What is the principle behind distillation?
- A) Difference in boiling points
- B) Difference in melting points
- C) Difference in solubility
- D) Difference in density
- The correct answer is A) Difference in boiling points. Distillation separates liquids based on their boiling points.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- Which of the following is used to dry organic solvents?
- A) Calcium chloride
- B) Sodium hydroxide
- C) Potassium permanganate
- D) Ammonium sulfate
- The correct answer is A) Calcium chloride. It is a common drying agent for organic solvents.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- The color of litmus paper in acidic solution is:
- A) Red
- B) Blue
- C) Green
- D) Yellow
- The correct answer is A) Red. Litmus paper turns red in acidic solutions.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- What is the use of a pH meter?
- A) To measure temperature
- B) To measure pH
- C) To measure pressure
- D) To measure volume
- The correct answer is B) To measure pH. A pH meter is specifically designed to measure the acidity or alkalinity of a solution.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- Which of the following is a primary standard?
- A) NaOH
- B) K2Cr2O7
- C) HCl
- D) NaCl
- The correct answer is B) K2Cr2O7. It is a primary standard used in redox titrations.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- Which method is used for the separation of liquid mixtures?
- A) Filtration
- B) Chromatography
- C) Centrifugation
- D) Crystallization
- The correct answer is B) Chromatography. It is used for separating liquid mixtures based on different affinities.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- What does the term 'dilution' refer to?
- A) Concentrating a solution
- B) Decreasing the concentration of a solution
- C) Increasing the boiling point
- D) None of the above
- The correct answer is B) Decreasing the concentration of a solution. Dilution involves adding solvent to reduce concentration.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- The process of converting a solid directly to a gas is called:
- A) Evaporation
- B) Sublimation
- C) Condensation
- D) Deposition
- The correct answer is B) Sublimation. It is the process where a solid changes directly to gas.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- In a redox reaction, the substance that gets reduced is:
- A) Oxidizing agent
- B) Reducing agent
- C) Catalyst
- D) None of the above
- The correct answer is A) Oxidizing agent. It is the species that gains electrons.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
- Which apparatus is used to measure the volume of a liquid accurately?
- A) Beaker
- B) Graduated cylinder
- C) Burette
- D) Both B and C
- The correct answer is D) Both B and C. Both graduated cylinders and burettes are used for accurate volume measurements.
- (This question has been asked thrice- JEE Main 2018, JEE Main 2022, JEE Main 2024)
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