JEE Main questions
34568 published questions with worked solutions.
- Given below are two statements Statement (I) : The orbitals having same energy are called as degenerate orbitals. Statement (II)...
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : CH₂ =...
- The Lassaigne's extract is boiled with dil. HNO₃ before testing for halogens because,
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : There...
- What happens to freezing point of benzene when small quantity of naphthalene is added to benzene?
- On a thin layer chromatographic plate, an organic compound moved by 3.5 cm, while the solvent moved by 5 cm. The retardation...
- 2MnO₄⁻ + bI⁻ + cH₂O → xI₂ + yMnO₂ + zOH⁻. If the above equation is balanced with integer coefficients, the value of z is ________.
- 0.05 cm thick coating of silver is deposited on a plate of 0.05 m² area. The number of silver atoms deposited on plate are...
- The mass of sodium acetate (CH₃COONa) required to prepare 250 mL of 0.35 M aqueous solution is ________ g. (Molar mass of...
- If IUPAC name of an element is "Unununnium" then the element belongs to nᵗʰ group of Periodic table. The value of n is ________.
- The compound formed by the reaction of ethanal with semicarbazide contains ________ number of nitrogen atoms.
- The total number of molecular orbitals from 2s and 2p atomic orbitals of a diatomic molecule is ________.
- The rate of First order reaction is 0.04 mol L⁻¹ s⁻¹ at 10 minutes and 0.03 mol L⁻¹ s⁻¹ at 20 minutes after initiation. Half life...
- The pH at which Mg(OH)₂ [K_sp = 1 × 10⁻¹¹] begins to precipitate from a solution containing 0.10 M Mg²⁺ ions is ________.
- If f(x) = vmatrix 2 ^4x & 2 ^4x & 3 + ^22x 3 + 2 ^4x & 2 ^4x & ^22x 2 ^4x & 3 + 2 ^4x & ^22x vmatrix , then 15f'(0) is equal to :
- Let f : [−π/2, π/2] → ℝ be a differentiable function such that f(0) = 1/2. If _ x 0 x _0^xf(t)dt e^ x^2 - 1 = , then 8α² is equal...
- If 2sin³x + sin2xcosx + 4sinx – 4 = 0 has exactly 3 solutions in the interval [0, nπ/2], n ∈ ℕ, then the roots of the equation x²...Not in JEE Main syllabus
- If the domain of the function f(x) = ^ -1 ( 2 - |x| 4 ) + ( _e(3 - x) )^ -1 is [−α, β) − γ , then α + β + γ is equal to
- Let M denote the median of the following frequency distribution | Class | 0-4 | 4-8 | 8-12 | 12-16 | 16-20 |...
- Two integers x and y are chosen with replacement from the set 0, 1, 2, 3, …, 10 . Then the probability that |x – y| > 5, is: