Exam Details
JEE Main 2021 (Online) 24th February Evening Shift
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Questions
90
Duration
60 mins
Package
IIT-JEE Main - Previous Year Papers
Paper pattern & analysis
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Topic distribution
Subtopic distribution
Difficulty distribution
90questions
Medium
57
63.3%
Easy
32
35.6%
Hard
1
1.1%
Question type distribution
90questions
Multiple Choices
60
66.7%
Numerical Answer Type (NAT)
30
33.3%
Sample questions from this paper
Questions are selected across the paper subjects wherever the paper contains that variety.
2021 · Chemistry · Physical Chemistry · Surface Chemistry
JEE Main 2021 (Online) 24th February Evening Shift
Most suitable salt which can be used for efficient clotting of blood will be :
2021 · Physics · Modern Physics · Electronic Devices
JEE Main 2021 (Online) 24th February Evening Shift
Given below are two statements :
Statement I : PN junction diodes can be used to function as transistor, simply by connecting two diodes, back to back, which acts as the base terminal.
Statement II : In the study of transistor, the amplification factor \(\beta\) indicates ratio of the collector current to the base current.
In the light of the above statements, choose the correct answer from the options given below.
Statement I : PN junction diodes can be used to function as transistor, simply by connecting two diodes, back to back, which acts as the base terminal.
Statement II : In the study of transistor, the amplification factor \(\beta\) indicates ratio of the collector current to the base current.
In the light of the above statements, choose the correct answer from the options given below.
2021 · Mathematics · Algebra · Binomial Theorem
JEE Main 2021 (Online) 24th February Evening Shift
If \(n \ge 2\) is a positive integer, then the sum of the series \({}^{n + 1}{C_2} + 2\left( {{}^2{C_2} + {}^3{C_2} + {}^4{C_2} + ... + {}^n{C_2}} \right)\) is :
2021 · Chemistry · Inorganic Chemistry · Environmental Chemistry
JEE Main 2021 (Online) 24th February Evening Shift
Given below are two statements :
Statement I : The value of the parameter "Biochemical Oxygen Demand (BOD)" is important for survival of aquatic life.
Statement II : The optimum value of BOD is 6.5 ppm.
In the light of the above statements, choose the most appropriate answer from the options given below :
Statement I : The value of the parameter "Biochemical Oxygen Demand (BOD)" is important for survival of aquatic life.
Statement II : The optimum value of BOD is 6.5 ppm.
In the light of the above statements, choose the most appropriate answer from the options given below :
2021 · Physics · Modern Physics · Communication Systems
JEE Main 2021 (Online) 24th February Evening Shift
A signal of 0.1 kW is transmitted in a cable. The attenuation of cable is \(-\)5 dB per km and cable length is 20 km. The power received at receiver is 10\(-\)x W. The value of x is ________.
[Gain in \(dB = 10{\log _{10}}\left( {{{{P_o}} \over {{P_i}}}} \right)\)]
[Gain in \(dB = 10{\log _{10}}\left( {{{{P_o}} \over {{P_i}}}} \right)\)]
Enter a numerical response
2021 · Mathematics · Algebra · 3D Geometry
JEE Main 2021 (Online) 24th February Evening Shift
The vector equation of the plane passing through the intersection
of the planes \(\overrightarrow r .\left( {\widehat i + \widehat j + \widehat k} \right) = 1\) and \(\overrightarrow r .\left( {\widehat i - 2\widehat j} \right) = - 2\), and the point (1, 0, 2) is :
of the planes \(\overrightarrow r .\left( {\widehat i + \widehat j + \widehat k} \right) = 1\) and \(\overrightarrow r .\left( {\widehat i - 2\widehat j} \right) = - 2\), and the point (1, 0, 2) is :