JEE Main questions
34568 published questions with worked solutions.
- The electric potential at the surface of an atomic nucleus (z = 50) of radius 9 × 10⁻¹³ cm is ____ × 10⁶ V.
- If Rydberg's constant is R, the longest wavelength of radiation in Paschen series will be 7R , where α = ____.
- A series LCR circuit with L = 100 mH, C = 10^ -3 F and R = 10 Ω, is connected across an ac source of 220 V, 50 Hz supply. The...
- The reading of pressure metre attached with a closed pipe is 4.5 × 10⁴ N/m². On opening the valve, water starts flowing and the...
- A ring and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of both bodies are...
- A parallel beam of monochromatic light of wavelength 5000 Å is incident normally on a single narrow slit of width 0.001 mm. The...
- Which structure of protein remains intact after coagulation of egg white on boiling?
- Choose the correct option having all the elements with d¹⁰ electronic configuration from the following :
- Given below are two statements : Statement (I) : Oxygen being the first member of group 16 exhibits only –2 oxidation state....
- The molecular formula of second homologue in the homologous series of mono carboxylic acids is ____.
- The incorrect statement regarding conformations of ethane is:
- The technique used for purification of steam volatile water immiscible substances is:
- Which of the following cannot function as an oxidising agent?
- Phenolic group can be identified by a positive:
- Given below are two statements: Statement (I) : In the Lanthanoids, the formation Ce⁺⁴ is favoured by its noble gas...
- Which of the following statements is not correct about rusting of iron?
- Time required for completion of 99.9% of a First order reaction is ____ times of half life (t₁/₂) of the reaction.
- 9.3 g of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide...
- Volume of 3 M NaOH (formula weight 40 g mol⁻¹) which can be prepared from 84 g of NaOH is ____ × 10⁻¹ dm³.
- The number of non-polar molecules from the following is ____. HF, H₂O, SO₂, H₂, CO₂, CH₄, NH₃, HCl, CHCl₃, BF₃