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Content Curator updated | Updated On - Mar 7, 2023

JEE Main 2021 B.E./B.Tech Question Paper- March 17, 2021- Afternoon Session was rated to be relatively easy than the first shift paper by the applicants. The distribution of class XII syllabus questions and Class XI JEE Main Syllabus was roughly equal with 46 Questions asked from the former and 44 asked from the latter. Physics and Chemistry both sections were rated to be on easy difficulty level, while Mathematics section was rated to be of moderate difficulty. Candidates preparing for JEE Main 2022 can download the question papers with answer key PDFs for March 17, 2021, Afternoon session below.

JEE Main B.E./B.Tech Question Paper- March 17, 2021 Afternoon

JEE Main 2021 Question Paper JEE Main 2021 Answer Key
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JEE Main 2021 B.E./B.Tech Question Paper March 17 (Afternoon Session): Weightage of Topics

JEE Main 2021 B.E./B.Tech Question Paper March 17 (Afternoon Session) was conducted between 3.00 PM to 6.00 PM. The high weighting topics for each section were as follows:

  • Mathematics: Section had high weightage assigned to Differential Calculus (24%), Integral Calculus (20%), and Coordinate Geometry (15%). The number of questions from the class XII syllabus was significantly higher.
  • Physics: The high weighting topics were - Mechanics (33%), Electrodynamics (23%), and Modern Physics (17%) 
  • Chemistry: The high weighting topics were - Organic Chemistry II (23%), Inorganic Chemistry I (20%), Physical Chemistry II (20%), Inorganic Chemistry II (17%)

For detailed JEE Main Question Paper Analysis, visit- JEE Main Question Paper Analysis

JEE Main 2021 Questions with Solutions

1 A cube of side 'a' has point charges $+ Q$ located at each of its vertices except at the origin where the charge is $-Q$. The electric field at the centre of cube is:
2 If $Y, K$ and $\eta$ are the values of Young's modulus, bulk modulus and modulus of rigidity of any material respectively. Choose the correct relation for these parameters.
3 Two equal capacitors are first connected in series and then in parallel. The ratio of the equivalent capacities in the two cases will be:
4 An LCR circuit contains resistance of $110 \Omega$ and a supply of $220 V$ at $300 rad / s$ angular frequency. If only capacitance is removed from the circuit, current lags behind the voltage by $45^{\circ} .$ If on the other hand, only inductor is removed the current leads by $45^{\circ}$ with the applied voltage. The $rms$ current flowing in the circuit will be:
5 Calgon is used for water treatment. Which of the following statement is $NOT$ true about Calgon?
6 Statements about heavy water are given below
A. Heavy water is used in exchange reactions for the study of reaction mechanisms
B. Heavy water is prepared by exhaustive electrolysis of water
C. Heavy water has higher boiling point than ordinary water
D. Viscosity of $H _{2} O$ is greater than $D _{2} O$
7 Given below are two statements : Two photons having equal linear momenta have equal wavelengths. If the wavelength of photon is decreased, then the momentum and energy of a photon will also decrease. In the light of the above statements, choose the correct answer from the options given below.
8 If an emitter current is changed by $4 mA ,$ the collector current changes by $3.5 mA$. The value of $\beta$ will be
9 In Freundlich adsorption isotherm, slope of AB line is:
10 In the given figure, a mass $M$ is attached to a horizontal spring which is fixed on one side to a rigid support. The spring constant of the spring is $k$. The mass oscillates on a frictionless surface with time period $T$ and amplitude $A$. When the mass is in equilibrium position, as shown in the figure, another mass $m$ is gently fixed upon it. The new amplitude of oscillation will be:
11 The correct order of bond dissociation enthalpy of halogens is:
12 Which of the following are isostructural pairs?
A. $SO _{4}^{2-}$ and $CrO _{4}^{2-}$
B. $SiCl _{4}$ and $TiCl _{4}$
C. $NH _{3}$ and $NO _{3}^{-}$
D. $BCl _{3}$ and $BrCl _{3}$ $BCl _{3}$ and $BrCl _{3}$

JEE Main B.E/ B. Tech Question Paper with Answer Key PDFs

The links for JEE Main Previous Year Question papers are given below:

Other B.Tech Exam Question Papers

*The article might have information for the previous academic years, please refer the official website of the exam.

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