JEE Main questions
34568 published questions with worked solutions.
- The correct IUPAC name of K₂MnO₄ is
- Given below are two statements : Statement I : Fluorine has most negative electron gain enthalpy in its group. Statement II :...
- Alkyl halide is converted into alkyl isocyanide by reaction with
- Chromatographic technique/s based on the principle of differential adsorption is/are A. Column chromatography B. Thin layer...
- The ascending acidity order of the following H atoms (shown circled in the source) is A: HC≡C–Ⓗ B: H₂C=CH–Ⓗ C: (CH₃)₃C–Ⓗ D:...
- Match List-I with List-II. List-I (Bio Polymer): A. Starch, B. Cellulose, C. Nucleic acid, D. Protein List-II (Monomer): I....
- Phenol treated with chloroform in presence of sodium hydroxide, which further hydrolyzed in presence of an acid results
- Anomalous behavior of oxygen is due to its
- Match List-I with List-II. List-I (Compound): A. Ethanol, B. Phenol, C. m-Nitrophenol, D. p-Nitrophenol List-II (pKa value): I....
- Match List I with List II. List I (Spectral Series for Hydrogen): A. Lyman, B. Balmer, C. Paschen, D. Pfund List II (Spectral...
- Which of the following acts as a strong reducing agent ? (Atomic number: Ce = 58, Eu = 63, Gd = 64, Lu = 71)
- Which of the following statement are correct about Zn, Cd and Hg? A. They exhibit high enthalpy of atomization as the d-subshell...
- Standard enthalpy of vapourisation for CCl₄ is 30.5 kJ mol⁻¹. Heat required for vapourisation of 284 g of CCl₄ at constant...
- The oxidation number of iron in the compound formed during brown ring test for NO₃⁻ ion is ________.
- The following concentrations were observed at 500K for the formation of NH₃ from N₂ and H₂. At equilibrium ; [N₂] = 2 × 10⁻² M,...
- A constant current was passed through a solution of AuCl₄⁻ ion between gold electrodes. After a period of 10.0 minutes, the...
- The half-life of radioisotope bromine-82 is 36 hours. The fraction which remains after one day is ________ × 10⁻². (Given antilog...
- The total number of anti bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecules is ________.
- Molality of 0.8 M H₂SO₄ solution (density 1.06 cm⁻³) is ________ × 10⁻³ m.
- The total number of molecules with zero dipole moment among CH₄, BF₃, H₂O, HF, NH₃, CO₂ and SO₂ is ________.