1

IIT-JEE 1978

Subjective

+4

-0

Igniting MnO

_{2}converts it quantitatively to Mn_{3}O_{4}. A sample of pyrolusite is of the following composition : MnO_{2}80%, SiO_{2}and other inert constituents 15%, rest being water. The sample is ignited in air to constant weight. What is the percentage of Mn in the ignited sample? [O = 16, Mn = 54.9]2

IIT-JEE 1978

Subjective

+4

-0

Naturally occurring boron consists of two isotopes whose atomic weighs are 10.01 and 11.01. The atomic weight of natural oron is 10.81. Calculate the percentage of each isotope in natural boron.

3

IIT-JEE 1978

Subjective

+2

-0

What is the molarity and molality of a 13% solution (by weight) of sulphuric acid with a density of 1.02 g/ml? To what volume should 100 ml of this acid be diluted in order to prepare a 1.5 N solution?

Questions Asked from Some Basic Concepts of Chemistry (Subjective)

Number in Brackets after Paper Indicates No. of Questions

IIT-JEE 2003 (1)
IIT-JEE 2001 (1)
IIT-JEE 1999 (2)
IIT-JEE 1998 (1)
IIT-JEE 1996 (1)
IIT-JEE 1994 (2)
IIT-JEE 1993 (1)
IIT-JEE 1992 (2)
IIT-JEE 1991 (2)
IIT-JEE 1990 (3)
IIT-JEE 1989 (1)
IIT-JEE 1988 (2)
IIT-JEE 1985 (1)
IIT-JEE 1983 (2)
IIT-JEE 1982 (1)
IIT-JEE 1981 (1)
IIT-JEE 1980 (6)
IIT-JEE 1979 (5)
IIT-JEE 1978 (5)

JEE Advanced Subjects

Physics

Mechanics

Units & Measurements Motion Laws of Motion Work Power & Energy Impulse & Momentum Rotational Motion Properties of Matter Heat and Thermodynamics Simple Harmonic Motion Waves Gravitation Motion in a Plane

Electricity

Electrostatics Current Electricity Capacitor Magnetism Electromagnetic Induction Alternating Current Electromagnetic Waves

Optics

Modern Physics

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Structure of Atom Redox Reactions Gaseous State Equilibrium Solutions Thermodynamics Chemical Kinetics and Nuclear Chemistry Electrochemistry Solid State & Surface Chemistry

Inorganic Chemistry

Periodic Table & Periodicity Chemical Bonding & Molecular Structure Isolation of Elements Hydrogen s-Block Elements p-Block Elements d and f Block Elements Coordination Compounds Salt Analysis

Organic Chemistry

Mathematics

Algebra

Quadratic Equation and Inequalities Sequences and Series Mathematical Induction and Binomial Theorem Matrices and Determinants Permutations and Combinations Probability Vector Algebra and 3D Geometry Statistics Complex Numbers

Trigonometry

Coordinate Geometry

Calculus