Exam Details
JEE MAIN 2021 ONLINE 20TH JULY MORNING SHIFT
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Questions
90
Duration
180 mins
Package
IIT-JEE Main - Previous Year Papers
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Topic distribution
Subtopic distribution
Difficulty distribution
90questions
Medium
62
68.9%
Easy
24
26.7%
Hard
4
4.4%
Question type distribution
90questions
Multiple Choices
60
66.7%
Numerical Answer Type (NAT)
30
33.3%
Syllabus
Full Syllabus
Sample questions from this paper
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2021 · Physics · Modern Physics · Atoms And Nuclei
JEE MAIN 2021 ONLINE 20TH JULY MORNING SHIFT
A radioactive material decays by simultaneous emissions of two particles with half lives of 1400 years and 700 years respectively. What will be the time after which one third of the material remains ? (Take ln 3 = 1.1)
2021 · Chemistry · Physical Chemistry · Solid State
JEE MAIN 2021 ONLINE 20TH JULY MORNING SHIFT
Given below are two statements. One is labelled as Assertion A nd the other is labelled as Reason R.
Assertion A : Sharp glass edge becomes smooth on heating it upto its melting point.
Reason R : The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.
Assertion A : Sharp glass edge becomes smooth on heating it upto its melting point.
Reason R : The viscosity of glass decreases on melting.
Choose the most appropriate answer from the options given below.
2021 · Mathematics · Algebra · Binomial Theorem
JEE MAIN 2021 ONLINE 20TH JULY MORNING SHIFT
The coefficient of x256 in the expansion of
(1 \(-\) x)101 (x2 + x + 1)100 is :
(1 \(-\) x)101 (x2 + x + 1)100 is :
2021 · Physics · Mechanics · Waves
JEE MAIN 2021 ONLINE 20TH JULY MORNING SHIFT
The frequency of a car horn encountered a change from 400 Hz to 500 Hz, when the car approaches a vertical wall. If the speed of sound is 330 m/s. Then the speed of car is ___________ km/h.
Enter a numerical response
2021 · Chemistry · Physical Chemistry · Surface Chemistry
JEE MAIN 2021 ONLINE 20TH JULY MORNING SHIFT
The conditions given below are in the context of observing Tyndall effect in colloidal solutions :
(A) The diameter of the colloidal particles is comparable to the wavelength of light used.
(B) The diameter of the colloidal particles is much smaller than the wavelength of light used.
(C) The diameter of the colloidal particles is much larger than the wavelength of light used.
(D) The refractive indices of the dispersed phase and the dispersion medium are comparable.
(E) The dispersed phase has a very different refractive index from the dispersion medium.
Choose the most appropriate conditions from the options given below :
(A) The diameter of the colloidal particles is comparable to the wavelength of light used.
(B) The diameter of the colloidal particles is much smaller than the wavelength of light used.
(C) The diameter of the colloidal particles is much larger than the wavelength of light used.
(D) The refractive indices of the dispersed phase and the dispersion medium are comparable.
(E) The dispersed phase has a very different refractive index from the dispersion medium.
Choose the most appropriate conditions from the options given below :
2021 · Mathematics · Trigonometry · Properties Of Triangle
JEE MAIN 2021 ONLINE 20TH JULY MORNING SHIFT
If in a triangle ABC, AB = 5 units, \(\angle B = {\cos ^{ - 1}}\left( {{3 \over 5}} \right)\) and radius of circumcircle of \(\Delta\)ABC is 5 units, then the area (in sq. units) of \(\Delta\)ABC is :