JEE Main 2021 B.E./B.Tech Question Paper with Answer Key in Bengali (July 20, 2021- Afternoon Session)

JEE Main 2021 B.E./ B.Tech āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ- 20 āϜ⧁āϞāĻžāχ, 2021- āĻŦāĻŋāĻ•āĻžāϞāϕ⧇ āĻŦāĻŋāĻļ⧇āώāĻœā§āĻž āϕ⧋āϚāĻŋāĻ‚ āĻĒā§āϰāϤāĻŋāĻˇā§āĻ āĻžāύāϗ⧁āϞāĻŋ āĻŽāĻžāĻāĻžāϰāĻŋāĻ­āĻžāĻŦ⧇ āĻ•āĻ āĻŋāύ āĻŦāϞ⧇ āϰ⧇āϟ āĻ•āϰ⧇āϛ⧇āĨ¤ āĻĒāϰ⧀āĻ•ā§āώāĻžāϟāĻŋ āĻ›āĻŋāϞ āĻœā§‡āχāχ āĻŽā§‡āχāύ 3āϝāĻŧ āϏ⧇āĻļāύ⧇āϰ āĻĻā§āĻŦāĻŋāϤ⧀āϝāĻŧ āĻĒāϰ⧀āĻ•ā§āώāĻžāĨ¤ āĻĒāϰ⧀āĻ•ā§āώāĻžāϰ āĻŽāĻžāĻāĻžāϰāĻŋ āĻ…āϏ⧁āĻŦāĻŋāϧāĻžāϰ āϜāĻ¨ā§āϝ āĻāĻ•āϟāĻŋ āĻŦāĻĄāĻŧ āĻ…āĻŦāĻĻāĻžāύāĻ•āĻžāϰ⧀ āĻĢā§āϝāĻžāĻ•ā§āϟāϰ āĻ›āĻŋāϞ āĻ—āĻŖāĻŋāϤ āĻŦāĻŋāĻ­āĻžāĻ—, āϝ⧇āϟāĻŋāϤ⧇ āϜāϟāĻŋāϞ āĻāĻŦāĻ‚ āĻĻā§€āĻ°ā§āϘ āĻĒā§āϰāĻļā§āύ āĻ›āĻŋāϞ, āĻŦāĻŋāĻļ⧇āώ āĻ•āϰ⧇ āϏāĻŽā§āĻ­āĻžāĻŦā§āϝāϤāĻž āĻāĻŦāĻ‚ āĻĄāĻŋāĻĢāĻžāϰ⧇āύāĻļāĻŋāϝāĻŧāĻžāϞ āĻ•ā§āϝāĻžāϞāϕ⧁āϞāĻžāϏ āĻĨ⧇āϕ⧇āĨ¤ āĻ…āϏ⧁āĻŦāĻŋāϧāĻžāϰ āĻĻāĻŋāĻ• āĻĨ⧇āϕ⧇ āĻĻā§āĻŦāĻŋāϤ⧀āϝāĻŧāϟāĻŋ āĻ›āĻŋāϞ āĻĒāĻĻāĻžāĻ°ā§āĻĨāĻŦāĻŋāĻĻā§āϝāĻž āĻŦāĻŋāĻ­āĻžāĻ—, āϝ⧇āĻ–āĻžāύ⧇ āĻŽā§‡āĻ•āĻžāύāĻŋāĻ•ā§āϏ āĻāĻŦāĻ‚ āφāϧ⧁āύāĻŋāĻ• āĻĒāĻĻāĻžāĻ°ā§āĻĨāĻŦāĻŋāĻĻā§āϝāĻž āĻĨ⧇āϕ⧇ āωāĻ˛ā§āϞ⧇āĻ–āϝ⧋āĻ—ā§āϝ āĻĒāϰāĻŋāĻŽāĻžāĻŖ āĻĒā§āϰāĻļā§āύ āĻ›āĻŋāϞāĨ¤ āϜāϟāĻŋāϞāϤāĻž āĻāĻŦāĻ‚ āϤāĻ¤ā§āĻ¤ā§āĻŦ-āĻ­āĻŋāĻ¤ā§āϤāĻŋāĻ• āĻĒā§āϰāĻļā§āύ⧇āϰ āĻ•ā§āώ⧇āĻ¤ā§āϰ⧇ āϰāϏāĻžāϝāĻŧāύ āĻŦāĻŋāĻ­āĻžāϗ⧇āϰ āĻ…āϏ⧁āĻŦāĻŋāϧāĻž āĻ¸ā§āϤāϰāϟāĻŋ āĻĒāĻĻāĻžāĻ°ā§āĻĨāĻŦāĻŋāĻĻā§āϝāĻž āĻŦāĻŋāĻ­āĻžāϗ⧇āϰ āϏāĻŽāϤ⧁āĻ˛ā§āϝ āĻ›āĻŋāϞ; āϰāϏāĻžāϝāĻŧāύ āĻŦāĻŋāĻ­āĻžāϗ⧇ āϏāĻŦāĻšā§‡āϝāĻŧ⧇ āĻŦāĻĄāĻŧ āĻ…āĻŦāĻĻāĻžāύ āĻ›āĻŋāϞ āϜ⧈āĻŦ āϰāϏāĻžāϝāĻŧāύ (I āĻāĻŦāĻ‚ II)āĨ¤ JEE Main 2022-āĻāϰ āϜāĻ¨ā§āϝ āĻĒā§āϰāĻ¸ā§āϤ⧁āϤāĻŋ āύāĻŋāĻšā§āϛ⧇āύ āĻĒā§āϰāĻžāĻ°ā§āĻĨā§€āϰāĻž , āύāĻŋāĻšā§‡ āĻĨ⧇āϕ⧇ 20 āϜ⧁āϞāĻžāχ, 2021, āĻŦāĻŋāϕ⧇āϞ⧇āϰ āϏ⧇āĻļāύ⧇āϰ āϜāĻ¨ā§āϝ āωāĻ¤ā§āϤāϰ āϕ⧀ āĻĒāĻŋāĻĄāĻŋāĻāĻĢ āϏāĻš āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ āĻĄāĻžāωāύāϞ⧋āĻĄ āĻ•āϰāϤ⧇ āĻĒāĻžāϰ⧇āύ:

JEEMain B.E./ B.Tech āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ- 20 āϜ⧁āϞāĻžāχ, 2021 āĻŦāĻŋāϕ⧇āϞ



JEE Main 2021 B.E./ B.Tech āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ 20 āϜ⧁āϞāĻžāχ (āĻŦāĻŋāĻ•āĻžāϞ⧇āϰ āϏ⧇āĻļāύ): āĻĒ⧇āĻĒāĻžāϰ āĻŦāĻŋāĻļā§āϞ⧇āώāĻŖ

JEE Main 2021 B.E./ B.Tech āĻĒ⧇āĻĒāĻžāϰ 20 āϜ⧁āϞāĻžāχ āĻĢāϰ⧇āύ⧁āύ āϏ⧇āĻļāύ 3.00 PM āĻĨ⧇āϕ⧇ 6.00 PM āĻāϰ āĻŽāĻ§ā§āϝ⧇ āĻĒāϰāĻŋāϚāĻžāϞāĻŋāϤ āĻšāϝāĻŧ⧇āĻ›āĻŋāϞ, āĻĒā§āϰāϤāĻŋāϟāĻŋ āχāωāύāĻŋāĻŸā§‡āϰ āϜāĻ¨ā§āϝ āĻĒ⧇āĻĒāĻžāϰ āĻŦāĻŋāĻļā§āϞ⧇āώāĻŖ āύāĻŋāĻŽā§āύāϰ⧂āĻĒāĨ¤

āĻŦāĻŋāώāϝāĻŧ āĻŦāĻŋāώāϝāĻŧ āĻĒā§āϰāĻļā§āύ⧇āϰ āϏāĻ‚āĻ–ā§āϝāĻž
āĻĒāĻĻāĻžāĻ°ā§āĻĨāĻŦāĻŋāĻĻā§āϝāĻž āχāϞ⧇āĻ•ā§āĻŸā§āϰ⧋āĻĄāĻžāχāύāĻžāĻŽāĻŋāĻ•āϏ 3
āϤāĻžāĻĒ āĻāĻŦāĻ‚ āϤāĻžāĻĒāĻ—āϤāĻŋāĻŦāĻŋāĻĻā§āϝāĻž 3
āĻŽā§‡āĻ•āĻžāύāĻŋāĻ•ā§āϏ 13
āφāϧ⧁āύāĻŋāĻ• āĻĒāĻĻāĻžāĻ°ā§āĻĨāĻŦāĻŋāĻĻā§āϝāĻž 8
āĻ…āĻĒāϟāĻŋāĻ•ā§āϏ 1
SHM āĻāĻŦāĻ‚ āϤāϰāĻ™ā§āĻ— 2
āϰāϏāĻžāϝāĻŧāύ āĻ…āϜ⧈āĻŦ āϰāϏāĻžāϝāĻŧāύ I 3
āĻ…āϜ⧈āĻŦ āϰāϏāĻžāϝāĻŧāύ II 4
āϜ⧈āĻŦ āϰāϏāĻžāϝāĻŧāύ I 7
āϜ⧈āĻŦ āϰāϏāĻžāϝāĻŧāύ II 9
āϭ⧌āϤ āϰāϏāĻžāϝāĻŧāύ I 5
āϭ⧌āϤ āϰāϏāĻžāϝāĻŧāύ II 2
āĻ…āĻ‚āĻ• āĻĻā§āĻŦāĻŋāĻĒāĻĻ āωāĻĒāĻĒāĻžāĻĻā§āϝ 2
āĻ¸ā§āĻĨāĻžāύāĻžāĻ™ā§āĻ• āĻœā§āϝāĻžāĻŽāĻŋāϤāĻŋ 2
āĻ…āĻ¨ā§āϤāϰ⧀āĻ•āϰāĻŖ āĻ•ā§āϝāĻžāϞāϕ⧁āϞāĻžāϏ 4
āχāĻ¨ā§āϟāĻŋāĻ—ā§āϰāĻžāϞ āĻ•ā§āϝāĻžāϞāϕ⧁āϞāĻžāϏ 2
āĻĒāĻžāϰāĻŽā§āĻŸā§‡āĻļāύ āĻāĻŦāĻ‚ āĻ•āĻŽā§āĻŦāĻŋāύ⧇āĻļāύ 3
āϏāĻŽā§āĻ­āĻžāĻŦā§āϝāϤāĻž 2
āϭ⧇āĻ•ā§āϟāϰ āĻāĻŦāĻ‚ 3D 2
āĻĒāϰāĻŋāϏāĻ‚āĻ–ā§āϝāĻžāύ 2
āĻĻā§āĻŦāĻŋāϘāĻžāϤ āϏāĻŽā§€āĻ•āϰāĻŖ 3
āĻ—āĻžāĻŖāĻŋāϤāĻŋāĻ• āϝ⧁āĻ•ā§āϤāĻŋ 2
āĻ¤ā§āϰāĻŋāϕ⧋āĻŖāĻŽāĻŋāϤāĻŋ 2
āĻŽā§āϝāĻžāĻŸā§āϰāĻŋāĻ•ā§āϏ āĻāĻŦāĻ‚ āύāĻŋāĻ°ā§āϧāĻžāϰāĻ• 2
āĻ—āĻŖāĻŋāϤ⧇āϰ āĻŽā§ŒāϞāĻŋāĻ• āĻŦāĻŋāώāϝāĻŧ 2

āĻŦāĻŋāĻ¸ā§āϤāĻžāϰāĻŋāϤ āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ āĻŦāĻŋāĻļā§āϞ⧇āώāϪ⧇āϰ āϜāĻ¨ā§āϝ, āĻĻ⧇āϖ⧁āύ-JEE Main āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ āĻŦāĻŋāĻļā§āϞ⧇āώāĻŖ

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 BE/ B. āĻŸā§‡āĻ• āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ āωāĻ¤ā§āϤāϰ āϕ⧀ PDF āϏāĻš

āĻĒā§āϰāĻžāĻ°ā§āĻĨā§€āĻĻ⧇āϰ āϝāϤāϟāĻž āϏāĻŽā§āĻ­āĻŦ āφāϗ⧇āϰ āĻŦāĻ›āϰ⧇āϰ āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ⧇āϰ āĻšā§‡āĻˇā§āϟāĻž āĻāĻŦāĻ‚ āĻ…āύ⧁āĻļā§€āϞāύ āĻ•āϰāĻž āωāϚāĻŋāϤāĨ¤āĻ•āϞ⧇āϜāĻĻ⧁āύāĻŋāϝāĻŧāĻž JEE Main BE/ B. Tech āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ⧇āϰ āϜāĻ¨ā§āϝ āύ⧀āĻšā§‡āϰ āωāĻ¤ā§āϤāϰ āϕ⧀ āĻĒāĻŋāĻĄāĻŋāĻāĻĢ āϏāĻš āϞāĻŋāĻ™ā§āĻ•āϗ⧁āϞāĻŋ āϏāϰāĻŦāϰāĻžāĻš āĻ•āϰ⧇āϛ⧇:

āĻŦāĻŋāĻ•āĻ˛ā§āĻĒ B.Tech āĻĒāϰ⧀āĻ•ā§āώāĻžāϰ āĻĒā§āϰāĻļā§āύāĻĒāĻ¤ā§āϰ

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