JEE Main questions
34568 published questions with worked solutions.
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : S_N2...
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both...
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The...
- Compare the energies of following sets of quantum numbers for multielectron system. (A) n = 4, ℓ = 1 (B) n = 4, ℓ = 2 (C) n = 3,...
- On reaction of Lead Sulphide with dilute nitric acid which of the following is not formed ?
- Identify the incorrect statements regarding primary standard of titrimetric analysis A. It should be purely available in dry...
- The heat of solution of anhydrous CuSO₄ and CuSO₄·5H₂O are −70 kJ mol⁻¹ and +12 kJ mol⁻¹ respectively. The heat of hydration of...
- The standard reduction potentials at 298 K for the following half cells are given below : Cr₂O₇²⁻ + 14H⁺ + 6e⁻ → 2Cr³⁺ + 7H₂O, E°...
- When equal volume of 1M HCl and 1M H₂SO₄ are separately neutralised by excess volume of 1M NaOH solution, x and y kJ of heat is...
- Molarity (M) of an aqueous solution containing x g of anhyd. CuSO₄ in 500 mL solution at 32 °C is 2 × 10⁻¹ M. Its molality will...
- The total number of species from the following in which one unpaired electron is present, is ________. N₂, O₂, C₂⁻, O₂⁻, O₂²⁻,...
- Number of ambidentate ligands among the following is ________. NO₂⁻, SCN⁻, C₂O₄²⁻, NH₃, CN⁻, SO₄²⁻, H₂O
- Total number of essential amino acid among the given list of amino acids is ________. Arginine, Phenylalanine, Aspartic acid,...
- Number of colourless lanthanoid ions among the following is ________. Eu³⁺, Lu³⁺, Nd³⁺, La³⁺, Sm³⁺
- Let the line L intersect the lines x − 2 = −y = z − 1, 2(x + 1) = 2(y − 1) = z + 1 and be parallel to the line x-2 3 = y-1 1 =...
- The parabola y² = 4x divides the area of the circle x² + y² = 5 in two parts. The area of the smaller part is equal to
- The solution curve, of the differential equation 2y dy dx + 3 = 5 dy dx , passing through the point (0, 1) is a conic, whose...
- A ray of light coming from the point P(1, 2) gets reflected from the point Q on the x-axis and then passes through the point R(4,...
- Let λ, μ ∈ ℝ. If the system of equations 3x + 5y + λz = 3, 7x + 11y − 9z = 2, 97x + 155y − 189z = μ has infinitely many...
- The coefficient of x⁷⁰ in x²(1 + x)⁹⁸ + x³(1 + x)⁹⁷ + x⁴(1 + x)⁹⁶ + .... + x⁵⁴(1 + x)⁴⁶ is ⁹⁹C_p − ⁴⁶C_q. Then a possible value...