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Welcome to the BYJU’S JEE questions and answers page! Students and aspirants can access a huge library of questions covering all the important topics that are included in the JEE syllabus. The questions and answers have been prepared by a group of experienced subject matter experts. Students will find questions framed from Physics, Maths and Chemistry subjects.

The JEE questions and answers discussed here will give a much clearer idea of many JEE topics such as gravitation, thermodynamics, atomic structure, chemical bonding, binomial theorem, quadratic equation, etc. The questions have further been answered in an informative and easy to understand manner.

Alternatively, the questions are very important from an examination point of view and can help in quick revision of the different topics. Additionally, students can also clear their doubts and confusion by referring to these questions regarding any concept or topic. Students will find questions that are both conceptual and descriptive including definitions, principles, formulas, examples of, properties of, and types.

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Answer: As an electrophile, the marginally positive hydrogen atom in the sulphuric acid behaves and is highly attracted to the electrons in the pi bond. A Bronsted acid, or simply “acid”, is an...
Answer: Some electrons collide with atoms, other electrons or impurities as electrons pass through a metal conductor. Such collisions induce resistance and produce heat. Heating the metal conductor...
Answer: Lactose, the milk disaccharide, consists of a β-1,4-glycosidic linkage of galactose joined to glucose. As described earlier, in maltose, two glucose units are linked by an alpha-1,4...
Answer: To form an aqueous solution of sulfuric acid (H2SO4), sulphur trioxide (SO3) dissolves in and reacts with water. Sulfur trioxide is a crystalline solid that can fume in the sunlight, colourless...
Answer: Oxygen is the periodic table's most reactive portion. In the periodic table, it is the second most electronegative product, making it the group's most reactive.  The oxygen group is...
Answer: Infrared spectroscopy is the most common detection tool that organic chemists use to determine functional groups. Infrared spectroscopy (abbreviated IR spectroscopy) provides the study of how a...
Answer: Crystallization water is water that is chemically bound into the form of a crystal. For hydrated copper(II) sulphate, here is the formula. Note that the crystallising water is divided by a dot...
Answer: In Mathematics, a determinant is a special number that is calculated from the square matrix. If A is a matrix, the determinant of matrix A is represented by vertical lines on either side of the...
Answer: The cross product of two parallel vectors is a zero vector (i.e. . Now the cross product of two parallel vectors is: p>...
Answer: In Mathematics, transpose means flipping a matrix over its diagonal. In other words, the rows and columns of a matrix are swapped. The transpose is represented by the letter “T”, which is placed...
Answer: If a function is said to be continuous at x=a, it should possess all the the three conditions: f(a) should be defined exists...
Answer: The fourth root of any number say a is the value b such that when we multiply b for four times we get the value a. The value of 4th square root of 32 can be calculated as given below: This...
Answer: (1) 1 (2) 0 (3) -1 (4) None of these (cos π/2 + i sin π/2)(cos π/4+i sin  π/4)(cos π/8+i sin  π/8)...∞ = (cos π/2 + i sin π/2)(cos π/22+i sin  π/22)(cos π/23+i sin  π/23)...∞ = = (...
Answer: Given z1 = 1 + 2i and z2 = 3 + 5i. = 3-5i = (3-5i)(1+2i)/(3+5i) = (3-5i)(1+2i)(3+5i)/(3+5i)(3-5i) = (1+2i)(9-30i-25)/(9+25) = (1+2i)(-16-30i)/34 = (-16-32i-30i+60)/34 = (44-62i)/34 =...
Answer: Given arg (z) = θ z = r cos θ+i sin θ = r cos θ-i sin θ = r cos (-θ)-i sin (-θ)(-1) = r cos (-θ)+i sin (-θ) arg = -θ Hence option...
Answer: Given sin x + i cos 2x and cos x - i sin 2x are conjugate to each other. sin x - i cos 2x = cos x - i sin 2x Comparing real and imaginary parts sin x = cos x ..(i) cos 2x = sin 2x…(ii)...
Answer: Question. For any two complex numbers Z1 and Z2 and any real numbers a and b, |(az1 - bz2)|2+ |(az1 + bz2)|2 is equal to  1) (a2+b2)(|z1|+|z2|) 2) (a2+b2)(|z1|2+|z2|2) 3) (a2+b2)(|z1|-|z2|)2...
Answer: The Italian physicist Galileo Galilei is credited with the discovery of speed. Galileo first measured speed by considering the distance covered and the time it takes to cover the distance. In...
Answer: The expression to find the resistance is given as follows: From the equation, we understand that resistance is directly proportional to the length of the conductor and inversely proportional to...
Answer: Solution: Let z = x+iy = -(x-iy) z = => x+iy = -x+iy 2x = 0 x = 0 So z is purely imaginary. Hence option (2) is the answer...
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