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JEE Main 2021 July 20 Shift 1 Question Paper with Solution PDF- Download Here

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Content Curator updated | Updated On - Mar 7, 2023

JEE Main 2021 B.E./B.Tech was conducted by NTA on July 20 in the Forenoon Session. The exam commenced at 9:00 AM and ended at 12:00 PM. A total of 90 questions appeared in the exam that includes 10 NATs (Numerical Answer Type). The overall difficulty level was rated moderate. This year, the Mathematics section was rated the toughest section to attempt.

JEE Main 2021 B.E./B.Tech Question Paper- July 20, 2021- Forenoon Session)

JEE Main 2021 Question Paper	JEE Main 2021 Answer Key
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JEE Main 2022 Physics Preparation	JEE Main 2022 Chemistry Preparation	JEE Main 2022 Mathematics Preparation

JEE Main 2021 B.E./B.Tech Question Paper: Detailed Analysis

The below-mentioned table is showing the number of questions listed in the question paper as per their difficulty level-

Subjects	Easy	Moderate	Difficult
Physics	12	13	5
Chemistry	10	16	4
Mathematics	12	11	7
Total	34	40	16

It can be seen that moderate level questions dominated the question paper of JEE Main 2021 B.E./B.Tech on July 20 Forenoon Session. 40 out of 90 questions were of moderate level
Only 16 questions were of difficult level in the exam, while the remaining 34 questions were of easy level
Physics and Chemistry had equal number of easy questions
The Chemistry section had the least number of difficult level questions
16 out of 30 questions in Mathematics were of moderate level

A candidate must have attempted 65-70 questions to increase the chances of clearing the cutoff.

JEE Main 2021 Questions with Solutions

1	According to Bohr's atomic theory :- (A) Kinetic energy of electron is ∝Z²/n². (B) The product of velocity (v) of electron and principal quantum number (n), 'vn' ∝Z². (C) Frequency of revolution of electron in an orbit is ∝Z³/n³. (D) Coulombic force of attraction on the electron is ∝Z³/n⁴. Choose the most appropriate answer from the options given below:
2	Complete combustion of 1.80g of an oxygen containing compound (C_xH_yO₂) gave 2.64g of CO₂ and 1.08g of H₂O. The percentage of oxygen in the organic compound is:
3	Out of the following, which type of interaction is responsible for the stabilisation of ∝ -helix structure of proteins?
4	(A) HOCl + H₂O₂→ H₃O⁺+ Cl⁻+ O₂ (B) I₂+ H₂O₂+ 2OH⁻ → 2I⁻ + 2H₂O + O₂ Choose the correct option.
5	Which of the following equation depicts the oxidizing nature of H₂O₂?
6	Given below are two statements: Statement I : Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame. Statement II : Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame. In the light of the above statements, choose the most appropriate answer from the options given below.
7	Which of the following reaction/s will not give p− aminoazobenzene?
8	In the given figure, the energy levels of hydrogen atom have been shown along with some transitions marked $A , B , C , D$ and $E$. The transitions $A, B$ and $C$ respectively represent :
9	Four identical particles of equal masses $1 kg$ made to move along the circumference of a circle of radius $1 m$ under the action of their own mutual gravitational attraction. The speed of each particle will be :
10	If an emitter current is changed by $4 mA ,$ the collector current changes by $3.5 mA$. The value of $\beta$ will be
11	Match List -I with List -II
12	Each side of a box made of metal sheet in cubic shape is 'a' at room temperature 'T', the coefficient of linear expansion of the metal sheet is ' $\alpha^{\prime}$. The metal sheet is heated uniformly, by a small temperature $\Delta T ,$ so that its new temperature is $T +\Delta T$. Calculate the increase in the volume of the metal box.
13	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:

JEE Main B.E./B.Tech Previous Year Question Papers

Candidates can solve the question papers of the previous year to analyze their performance levels. To enhance the accuracy level, candidates are advised to solve JEE Main Question Papers daily. JEE Main B.E./B.Tech year wise and subject wise question paper links with answer key PDFs are provided below:

JEE Main 2021 Question Papers	JEE Main 2020 Question Papers
JEE Main 2019 Question Papers	JEE Main 2018 Question Papers

Similar B.Tech Question Papers Links

MHT CET Previous Year Question Paper	OJEE Previous Year Question Paper
TS EAMCET Previous Year Question Paper	AP EAMCET Previous Year Question Paper

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

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