JEE Main 24th Feb 2021 Shift 1 Question Paper Analysis

JEE Main February 2021 for B.Tech (Paper 1) has been conducted on February 24. Check the detailed exam analysis of JEE Main 24th February Shift 1 exam along with memory-based questions, solutions and answer key. The overall difficulty level of the paper was moderate.

Day 2 Shift 1 of JEE Main 2021 (Phase 1) has been conducted on February 24 for B.Tech (Paper 1). As per the new exam pattern of JEE Main 2021, the question paper has a total number of 90 questions. Out of 10 NAT questions, the candidates had to answer any five in each section, and there is no negative marking for the same. The three sections in the exam are Mathematics, Physics and Chemistry. You can check the JEE Main 2021 exam analysis for the exam scheduled on February 24 (Shift 1) along with the memory-based questions and answer key. The official JEE Main 2021 answer key will be released within two days after the exam.

JEE Main 24th Feb 2021 Shift 1 Exam Analysis

The exam analysis of JEE Main 24th Feb 2021 Shift 1 has been updated. The paper was not very difficult, and it is similar in the lines of previous years’ question papers. There were no surprising elements in the paper. The Chemistry was relatively easy, as most questions from NCERT books. The choice given for Numerical questions turned beneficial for students. From Chemistry Numerical, Physical Chemistry had more questions. From Polymers, there was a Match the Following type question. From Biomolecules, there was a question related to Alpha structure.

AspectAnalysis
Overall Difficulty Level of the ExamModerate
Difficulty Level of MathematicsEasy to Moderate (Calculation-Based Questions)
Difficulty Level of PhysicsEasy to Moderate
Difficulty Level of ChemistryEasy
Topics with More Weightage in MathematicsCalculus (3-4 Questions)
Vector
Probability
Coordinate Geometry
Complex Numbers (2 questions)
Topics with More Weightage in Physics 
Electrodynamics
Electrostatics
Kinematics
Topics with More Weightage in ChemistryPhysical Chemistry
Organic Chemistry
Difficulty Level of Numerical QuestionsLengthy
Expected Number of Good Attempts80 (out of 90) – Many Students Attempted Choice Also

Physics Chapter Wise Weightage of JEE Main 24th Feb Shift 1

Name of the ChapterWeightage
Electrodynamics17%
Heat & Thermodynamics17%
Mechanics37%
Modern Physics20%
Optics 7%
SHM & Waves3%

Physics Topic Wise Weightage of JEE Main 24th Feb Shift 1

The topic-wise weightage of JEE Main 24th Feb 2021 Shift 1 is as follows –

Name of the TopicTotal No. of Questions
Capacitance1
Current Electricity2
Electrostatics1
Alternating Current1
Heat Transfer1
KGT & Thermodynamics2
Calorimetry & Thermal Expansion2
Rigid Body Dynamics1
Centre of Mass1
Rectilinear Motion & Vectors1
Gravitation3
Unit & Dimension2
Friction2
Surface Tension1
Semiconductors2
Electromagnetic Waves & Communication1
Modern Physics3
Geometrical Optics & Physical Optics1
Wave Optics1
SHM1

Chemistry Chapter Wise Weightage of JEE Main 24th Feb Shift 1

The chapter-wise weightage of Chemistry in JEE Main 24th Feb Shift 1 is as follows –

Name of the ChapterWeightage
Inorganic Chemistry-I17%
Inorganic Chemistry-II13%
Organic Chemistry-227%
Physical Chemistry 120%
Physical Chemistry 217%
Organic Chemistry-17%

Chemistry Topic Wise Weightage of JEE Main 24th Feb Shift 1

The topic-wise weightage of JEE Main 24th Feb Shift 1 Chemistry is as follows –

Name of the TopicTotal No. of Questions
Chemical Bonding5
Environmental Chemistry1
p-Block (13-14 GRP)1
Periodic Table & Periodicity in Properties1
s-Block1
Coordination Compounds1
Metallurgy3
Biomolecules1
Polymers1
Aromatic Compounds3
Alkyl Halide, Alcohol & Ether (Reaction Mechanism)1
Grignard Reagent, Reduction, Oxidation & Hydrolysis2
Chemical Equilibrium1
Mole Concept3
Atomic Structure & Nuclear Chemistry1
Thermodynamics & Thermochemistry1
Chemical Kinetics1
Electrochemistry1
Solid State1
Surface Chemistry1
Solution & Colligative Properties1
Hydrocarbon2

Mathematics Chapter Wise Weightage of JEE Main 24th Feb Shift 1

The chapter-wise weightage of Mathematics in JEE Main 24th Feb Shift 1 is as follows –

Name of the ChapterWeightage
Binomial Theorem3%
Coordinate Geometry10%
Differential Calculus20%
Integral Calculus20%
Permutation & Combination3%
Probability3%
Sequence & Series3%
Vector & 3D7%
Mathematical Reasoning3%
Quadratic Equation7%
Trigonometry3%
Matrix & Determinants3%

Mathematics Topic Wise Weightage of JEE Main 24th Feb Shift 1

The topic-wise weightage of JEE Main 24th Feb Shift 1 Mathematics is as follows –

Name of the TopicTotal No. of Questions
Binomial Theorem1
Parabola1
Straight Line1
Circle1
Limit, Continuity, Differentiability2
Functions1
Tangent & Normal1
Maxima & Minima1
Application of Derivatives1
Definite Integration2
Differential Equation2
Indefinite Integration1
Area under Curve1
Permutation & Combination1
Probability1
Sequence & Series1
Vector1
Three Dimensional Geometry1
Mathematical Reasoning1
Quadratic Equation2
Height & Distance1
Matrices & Determinants1

Section Wise Difficulty Level of JEE Main 24th Feb Shift 1

The section-wise difficulty level of JEE Main 24th Feb 2021 is as follows –

Name of the SubjectNo. of Easy QuestionsAverageDifficult
Physics14106
Chemistry16113
Mathematics1596

JEE Main 2021 24th Feb 2021 Shift 1 Question Paper & Answer Key

QuestionQuestion
An astronaut has left the international space station to test a new space scooter. His partner measures the fall velocity changes which take place in 10s interval. Find the magnitude and direction of average acceleration at the beginning of 10 sec interval, the astronaut is moving towards the x-axis in 10m/sec and at the end is 10 sec. He is moving towards the -ve axis at 5m/sec.
Ans. 1.5 m/sex, -ve x-axis
What will be the energy if you increase lambda
Two capacitors are given. Find the series and parallel resistant and their ratio.Find the work done by the cylcin process.
Calculate the ionization energy of all third period elements.If there is degradation of vegetation, then what effect is caused in the environment from gas released?
A P and V graph was given, find the work done.Calculate the ionization energy of all third period elements.
The non-existence of PbI4 is due to ________
Ans. Small size of Pb ion and large size of I ion. Highly reduced power of I ion.
Block m has amplitude A. If another mass of m is added what will be the new amplitude?
A body cools down from 100C to 90C in 20 minutes. It will cool down from 110C to 100C in _____
Ans. Less than 20 minute
An ore of Tin containing FeCrO4 is concentrated by _____
Ans. Magnetic separator
A cube is given and it has -q charge in one corner and +q charges in all the remaining 7 corners. Find the electric field inside the cube.Compare the Ionisation Energy of SC, RI, V, Cr, Mn…
What is the composition of gunmetal?
Ans. 88 percent copper, 10 percent tin, and 2 percent zinc 
The ratio of effusion does not depend on _____
Ans. Size of molecule
Youngs double slit experiment  . Relation between slit width and wavelength  There was a question  from communication 
The relation between youngs modulus bulk modulus and shear modulus( mcq)Ration between time period of two satellite( mcq)
There was a question from current electricitu regarding the potential  differences  between two points Relation between f and r of convex mirror
A velocity versus time graph was given. Had to choose the option showing acceleration versus time.An ordinary dice. The probability of odd numbers coming twice is equal to probability of even numbers coming 3 times. Find probability of getting odd numbers 3 times
Two towers. One is 3 times the height of the other. Distance between them 150 m. From the mid point of the distance between 2 towers, angle of elevation calculated for both the roofs. The angles are complementary. Find height of short building.  

Total Registrations for JEE Main February 2021 Paper 1

The total number of registrations for JEE Main February 2021 Paper 1 is as follows –

CategoryMaleFemaleTransgender
General1,96,67390,5221
Gen-EWS45,37218,0280
OBC- NCL (Central List)1,54,87267,1811
SC41,62615,9480
ST16,3096,0922
PwD1,4483300
Total4,54,8521,97,7714

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