JEE Main questions
34495 published questions with worked solutions.
- A person measures mass of 3 different particles as 435.42 g, 226.3 g and 0.125 g. According to the rules for arithmetic...
- During the melting of a slab of ice at 273 K at atmospheric pressure:
- The work function of a metal is 3 eV. The color of the visible light that is required to cause emission of photoelectrons is
- The electrostatic potential on the surface of uniformly charged spherical shell of radius R = 10 cm is 120 V. The potential at...
- A gas is kept in a container having walls which are thermally non-conducting. Initially the gas has a volume of 800 cm³ and...
- The radii of curvature for a thin convex lens are 10 cm and 15 cm respectively. The focal length of the lens is 12 cm. The...
- Two coherent monochromatic light beams of intensities 4I and 9I are superimposed. The difference between the maximum and minimum...
- A 4.0 cm long straight wire carrying a current of 8 A is placed perpendicular to a uniform magnetic field of strength 0.15 T. The...
- 2 moles each of ethylene glycol and glucose are dissolved in 500 g of water. The boiling point of the resulting solution is:...
- Among 10⁻⁹ g (each) of the following elements, which one will have the highest number of atoms? Element: Pb, Po, Pr and Pt
- Number of molecules from below which cannot give iodoform reaction is : Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol,...
- Given below are two statements : Statement (I) : A catalyst cannot alter the equilibrium constant (K_C) of the reaction,...
- Match the List-I with List-II. List-I (Molecules/ion): (A) PF_5 (B) SF_6 (C) Ni(CO)_4 (D) [PtCl_4]^ 2- List-II (Hybridisation of...
- In a reaction A + B → C, initial concentrations of A and B are related as [A]_0 = 8[B]_0. The half lives of A and B are 10 min...
- The metal ions that have the calculated spin only magnetic moment value of 4.9 B.M. are A. Cr²⁺ B. Fe²⁺ C. Fe³⁺ D. Co²⁺ E. Mn³⁺...
- Given below are two statements: Statement I: The N – N single bond is weaker and longer than that of P – P single bond. Statement...
- Which of the following statements are correct? A. The process of adding an electron to a neutral gaseous atom is always...
- The correct order of the complexes [Co(NH_3)_5(H_2O)]^ 3+ (A), [Co(NH_3)_6]^ 3+ (B), [Co(CN)_6]^ 3- (C) and [CoCl(NH_3)_5]^ 2+...
- The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is _____. FeCl_3 + KOH +...
- Given : H^ _ sub [C(graphite)] = 710 kJ mol⁻¹ _ C-H H^ = 414 kJmol⁻¹ _ H-H H^ = 436 kJmol⁻¹ _ C=C H^ = 611 kJmol⁻¹ The H_f^ for...