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Exam Details

IIT JEE 1981

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Questions 47
Duration 180 mins
Package IIT-JEE Advance - Previous Year Papers

Paper pattern & analysis

Filter this paper by subject, topic or subtopic. Every graph updates from the selected questions.

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Showing all 47 questions in this paper.

Subject distribution

Mathematics
30 Qs
Chemistry
15 Qs
Physics
2 Qs

Topic distribution

Algebra
9 Qs
Physical Chemistry
9 Qs
Coordinate Geometry
6 Qs
Calculus
6 Qs
Inorganic Chemistry
5 Qs
Trigonometry
5 Qs
Calculus
3 Qs
Mechanics
2 Qs
Physical Chemistry
1 Qs
Algebra
1 Qs

Subtopic distribution

Vector Algebra
3 Qs
Complex Numbers
3 Qs
Gaseous State
3 Qs
Application Of Derivatives
3 Qs
Definite Integration
3 Qs
Circle
2 Qs
Some Basic Concepts Of Chemistry
2 Qs
Structure Of Atom
2 Qs
S Block Elements
2 Qs
Probability
2 Qs
Chemical Bonding And Molecular Structure
2 Qs
Trigonometric Functions And Equations
2 Qs

Difficulty distribution

Easy 25 53.2%
Medium 19 40.4%
Hard 3 6.4%

Question type distribution

Multiple Choices 25 53.2%
Subjective 21 44.7%
Fill in the blanks 1 2.1%

Syllabus

Full Syllabus

Sample questions from this paper

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

1
1981 · Physics · Mechanics · Laws Of Motion
IIT JEE 1981
When a person walks on a rough surface, the frictional force exerted by the surface on the person is opposite to the direction of his motion.
A
TRUE
B
FALSE
2
1981 · Mathematics · Algebra · Quadratic Equation And Inequalities
IIT JEE 1981
For every integer n > 1, the inequality \({(n!)^{1/n}} < {{n + 1} \over 2}\) holds.
A
TRUE
B
FALSE
3
1981 · Chemistry · Physical Chemistry · Some Basic Concepts Of Chemistry
IIT JEE 1981
If 0.50 mol of BaCl2 is mixed with 0.20 mol of Na3PO4, the maximum amount of Ba3(PO4)2 that can be formed is
A
0.70
B
0.50
C
0.20
D
0.10
4
1981 · Physics · Mechanics · Units And Measurements
IIT JEE 1981
A gas bubble, from an explosion under water, oscillates with a period T proportional to padbEc. Where 'P' is the static pressure, 'd' is the density of water and 'E' is the total energy of the explosion. Find the value of a, b and c.
Write your response
5
1981 · Mathematics · Coordinate Geometry · Circle
IIT JEE 1981
Let A be the centre of the circle \({x^2}\, + \,{y^2}\, - \,2x\,\, - 4y\, - 20 = 0\,\). Suppose that the tangents at the points B (1, 7) and D (4. - 2) on the circle meet at the point C. Find the area of the quadrilateral ABCD.
Write your response
6
1981 · Chemistry · Physical Chemistry · Gaseous State
IIT JEE 1981
Equal weights of methane and oxygen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by oxygen is
A
1/3
B
1/2
C
2/3
D
\({1 \over 3} \times {{273} \over {298}}\)