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Exam Details

JEE MAIN 2021 ONLINE 22TH JULY EVENING SHIFT

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Questions 90
Duration 180 mins
Package IIT-JEE Main - Previous Year Papers

Paper pattern & analysis

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Showing all 90 questions in this paper.

Subject distribution

Physics
30 Qs
Chemistry
30 Qs
Mathematics
30 Qs

Topic distribution

Algebra
17 Qs
Mechanics
14 Qs
Organic Chemistry
11 Qs
Inorganic Chemistry
10 Qs
Electricity
9 Qs
Physical Chemistry
9 Qs
Calculus
8 Qs
Modern Physics
5 Qs
Coordinate Geometry
3 Qs
Trigonometry
2 Qs
Optics
2 Qs

Subtopic distribution

Basics Of Organic Chemistry
4 Qs
Matrices And Determinants
3 Qs
Magnetic Properties Of Matter
2 Qs
P Block Elements
2 Qs
Vector Algebra
2 Qs
3D Geometry
2 Qs
Binomial Theorem
2 Qs
Heat And Thermodynamics
2 Qs
Sequences And Series
2 Qs
Rotational Motion
2 Qs
Center Of Mass
2 Qs
Vector Algebra
2 Qs

Difficulty distribution

Medium 52 57.8%
Easy 33 36.7%
Hard 5 5.6%

Question type distribution

Multiple Choices 60 66.7%
Numerical Answer Type (NAT) 30 33.3%

Syllabus

Full Syllabus

Sample questions from this paper

Questions are selected across the paper subjects wherever the paper contains that variety.

1
2021 · Physics · Modern Physics · Communication Systems
JEE MAIN 2021 ONLINE 22TH JULY EVENING SHIFT
What should be the height of transmitting antenna and the population covered if the television telecast is to cover a radius of 150 km? The average population density around the tower is 2000/km2 and the value of Re = 6.5 \(\times\) 106 m.
A
Height = 1241 m

Population covered = 7 \(\times\) 105
B
Height = 1731 m

Population covered = 1413 \(\times\) 105
C
Height = 1800 m

Population covered = 1413 \(\times\) 108
D
Height = 1600 m

Population covered = 2 \(\times\) 105
2
2021 · Chemistry · Physical Chemistry · Surface Chemistry
JEE MAIN 2021 ONLINE 22TH JULY EVENING SHIFT
When silver nitrate solution is added to potassium iodide solution then the sol produced is :
A
AgI / I\(-\)
B
AgI / Ag+
C
KI / NO\(_3^ -\)
D
AgNO3 / NO\(_3^ -\)
3
2021 · Mathematics · Algebra · Vector Algebra
JEE MAIN 2021 ONLINE 22TH JULY EVENING SHIFT
Let three vectors \(\overrightarrow a\), \(\overrightarrow b\) and \(\overrightarrow c\) be such that \(\overrightarrow a \times \overrightarrow b = \overrightarrow c\), \(\overrightarrow b \times \overrightarrow c = \overrightarrow a\) and \(\left| {\overrightarrow a } \right| = 2\). Then which one of the following is not true?
A
\(\overrightarrow a \times \left( {(\overrightarrow b + \overrightarrow c ) \times (\overrightarrow b \times \overrightarrow c )} \right) = \overrightarrow 0\)
B
Projection of \(\overrightarrow a\) on \((\overrightarrow b \times \overrightarrow c )\) is 2
C
\(\left[ {\matrix{ {\overrightarrow a } & {\overrightarrow b } & {\overrightarrow c } \cr } } \right] + \left[ {\matrix{ {\overrightarrow c } & {\overrightarrow a } & {\overrightarrow b } \cr } } \right] = 8\)
D
\({\left| {3\overrightarrow a + \overrightarrow b - 2\overrightarrow c } \right|^2} = 51\)
4
2021 · Physics · Electricity · Magnetic Properties Of Matter
JEE MAIN 2021 ONLINE 22TH JULY EVENING SHIFT
Choose the correct option
A
True dip is always equal to apparent dip.
B
True dip is not mathematically related to apparent dip.
C
True dip is less than the apparent dip.
D
True dip is always greater than the apparent dip.
5
2021 · Chemistry · Inorganic Chemistry · Isolation Of Elements
JEE MAIN 2021 ONLINE 22TH JULY EVENING SHIFT
Sulphide ion is soft base and its ores are common for metals.

(a) Pb (b) Al (c) Ag (d) Mg
A
(a) and (c) only
B
(a) and (d) only
C
(a) and (b) only
D
(c) and (d) only
6
2021 · Mathematics · Algebra · Mathematical Reasoning
JEE MAIN 2021 ONLINE 22TH JULY EVENING SHIFT
Which of the following Boolean expressions is not a tautology?
A
(p \(\Rightarrow\) q) \(\vee\) (\(\sim\) q \(\Rightarrow\) p)
B
(q \(\Rightarrow\) p) \(\vee\) (\(\sim\) q \(\Rightarrow\) p)
C
(p \(\Rightarrow\) \(\sim\) q) \(\vee\) (\(\sim\) q \(\Rightarrow\) p)
D
(\(\sim\) p \(\Rightarrow\) q) \(\vee\) (\(\sim\) q \(\Rightarrow\) p)