JEE Main questions
34495 published questions with worked solutions.
- Identify the correct statements : A. Electrostatic field lines form closed loops. B. The electric field lines point radially...
- The time period of a simple harmonic oscillator is T=2 k m . The measured value of mass (m) of the object is 10 g with an...
- Two tuning forks A and B are sounded together giving rise to 8 beats in 2 s. When fork A is loaded with wax, the beat frequency...
- An inductor stores 16 J of magnetic field energy and dissipates 32 W of thermal energy due to its resistance when an a.c. current...
- A beam of light consisting of wavelengths 650 nm and 550 nm illuminates the Young's double slits with separation of 2 mm such...
- Identify the correct statements : The presence of -NO_2 group in benzene ring A. activates the ring towards electrophilic...
- Given below are two statements : Statement I : The increasing order of boiling point of hydrogen halides is HCl<HBr<HI<HF....
- Consider the elements N, P, O, S, Cl and F. The number of valence electrons present in the elements with most and least metallic...
- Observe the following equilibrium in a 1 L flask. A(g) B(g) At T(K), the equilibrium concentrations of A and B are 0.5 M and...
- The plot of _ 10 K vs 1 T gives a straight line. The intercept and slope respectively are (where K is equilibrium constant).
- The reactions which produce alcohol as the product : A. CH_4+O_2 Mo_2O_3, B. 2CH_3CH_3+3O_2 (CH_3COO)_2Mn, C. (CH_3)_3CH KMnO_4...
- Consider the following statements about manganate and permanganate ions. Identify the correct statements : A. The geometry of...
- The wavelength of photon 'A' is 400 nm. The frequency of photon 'B' is 10^ 16 s⁻¹. The wave number of photon 'C' is 10^4 cm⁻¹....
- Consider the following aqueous solutions. I. 2.2 g Glucose in 125 mL of solution. II. 1.9 g Calcium chloride in 250 mL of...
- The correct order of acidic strength of the major products formed in the given reactions, is : A. PhNH_2 [(2) ,CuCN] (1)...
- Total number of alkali insoluble solid sulphonamides obtained by reaction of given amines with Hinsberg's reagent is……. Aniline,...
- Consider the following reactions. Na_2B_4O_7 2X+Y CuSO_4+Y Non-Luminous flame Z+SO_3 2Z+2X+Carbon Luminous flame 2Q+Na_2B_4O_7+CO...
- For the given reaction; CaCO_3+2HCl CaCl_2+H_2O+CO_2 If 90 g CaCO_3 is added to 300 mL of HCl which contains 38.55% HCl by mass...
- The correct increasing order of spin-only magnetic moment values of the complex ions [MnBr_4]^ 2- (A), [Cu(H_2O)_6]^ 2+ (B),...
- A B (first reaction) C D (second reaction) Consider the above two first-order reactions. The rate constant for first reaction at...