JEE Main questions
34495 published questions with worked solutions.
- A train starting from rest first accelerates uniformly up to a speed of 80 km/h for time t, then it moves with a constant speed...
- In photoelectric experiment energy of 2.48 eV irradiates a photo sensitive material. The stopping potential was measured to be...
- A big drop is formed by coalescing 1000 small droplets of water. The ratio of surface energy of 1000 droplets to that of energy...
- When a dc voltage of 100V is applied to an inductor, a dc current of 5A flows through it. When an ac voltage of 200V peak value...
- The refractive index of prism is μ = √3 and the ratio of the angle of minimum deviation to the angle of prism is one. The value...
- A wire of resistance R and radius r is stretched till its radius became r/2. If new resistance of the stretched wire is xR, then...
- A circular coil having 200 turns, 2.5 × 10⁻⁴ m² area and carrying 100 A current is placed in a uniform magnetic field of 1 T....
- A particle is doing simple harmonic motion of amplitude 0.06 m and time period 3.14 s. The maximum velocity of the particle is...
- Given below are two statements: Statement I: Picric acid is 2, 4, 6-trinitrotoluene. Statement II: Phenol-2, 4-disulphuric acid...
- Match List-I with List-II: List-I (Hybridization): A. sp³ B. dsp² C. sp³d D. sp³d² List-II (Orientation in Space): I. Trigonal...
- Which of the following statements are correct? A. Glycerol is purified by vacuum distillation because it decomposes at its normal...
- Match List-I with List-II: List-I (Compound/Species): A. SF₄ B. BrF₃ C. BrO₃⁻ D. NH₄⁺ List-II (Shape/Geometry): I. Tetrahedral...
- Consider the following complexes: (A) [CoCl(NH₃)₅]²⁺, (B) [Co(CN)₆]³⁻, (C) [Co(NH₃)₅(H₂O)]³⁺, (D) [Cu(H₂O)₄]²⁺. The correct order...
- Match List-I with List-II: List-I (Precipitating reagent and conditions): A. NH₄Cl + NH₄OH B. NH₄OH + Na₂CO₃ C. NH₄OH + NH₄Cl +...
- The electron affinity value are negative for: A. Be → Be⁻ B. N → N⁻ C. O → O²⁻ D. Na → Na⁻ E. Al → Al⁻ Choose the most...
- The number of element from the following that do not belong to lanthanoids is: Eu, Cm, Er, Tb, Yb and Lu
- The density of 'x' M solution ('x' molar) of NaOH is 1.12 g mL⁻¹, while in molality, the concentration of the solution is 3 m (3...
- Which among the following aldehydes is most reactive towards nucleophilic addition reaction?
- If equal number of H₂, I₂ and HI molecules are present at equilibrium for the reaction H₂(g) + I₂(g) ⇌ 2HI(g), the K_P for the...
- Match List-I with List-II: List-I (Compound): A. Iodoform B. Carbon tetrachloride C. CFC D. DDT List-II (Uses): I. Fire...