JEE Main questions
34495 published questions with worked solutions.
- A thin solid disk of 1 kg is rotating along its diameter axis at the speed of 1800 rpm. By applying an external torque of 25 Nm...
- Correct statements for an element with atomic number 9 are A. There can be 5 electrons for which m_s = + 1 2 and 4 electrons for...
- HA(aq) H^+(aq) + A^-(aq) The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid HA is 0.20°C the...
- Given below are two statements : Statements-I : A homoleptic octahedral complex, formed using monodentate ligands, will not show...
- Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?
- The correct decreasing order of spin only magnetic moment values (BM) of Cu^+, Cu^ 2+ , Cr^ 2+ and Cr^ 3+ ions is :
- CH(CH_3)_2 attached to H_2N-CH-COOH, at pH = 2 gives A, at pH = 10 gives B. Choose the correct option for structures of A and B,...
- Given below are two statements: Statement I : H_2Se is more acidic than H_2Te Statement II : H_2Se has higher bond enthalpy for...
- In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eights of its...
- The number of species from the following that are involved in sp^3d^2 hybridization is [Co(NH_3)_6]^ 3+ , SF_6, [CrF_6]^ 3- ,...
- A (i) NaOH (ii) H _3 O ^+ B (i) EtOH (ii) H _2 SO _4, C 'A' shows positive Lassaigne's test for N and its molar mass is 121. 'B'...
- Consider the following half cell reaction Cr_2O_7^ 2- (aq) + 6e^- + 14H^+ (aq) 2Cr^ 3+ (aq) + 7H_2O( ) The reaction was conducted...
- The equilibrium constant for decomposition of H_2O(g) H_2(g) + 1 2 O_2(g) ( G^o = 92.34 kJ mol^ -1 ) is 8.0 × 10^ -3 at 2300 K...
- 20 mL of sodium iodide solution gave 4.74 g silver iodide when treated with excess of silver nitrate solution. The molarity of...
- The energy of an electron in first Bohr orbit of H^- atom is –13.6 eV. The magnitude of energy value of electron in the first...
- Let f be a differentiable function on R such that f(2) =1, f '(2) = 4. Let _ x 0 (f(2 + x))^ 3/x = e^ . Then the number of times...
- Consider two sets A and B, each containing three numbers in A.P. let the sum and the product of the elements of A be 36 and p...
- Let the product of _1 = (8 + i) + (7 + 4i) and _2 = (1 + 8i) + (4 + 7i) be + i , i = -1 . Let p and q be the maximum and the...
- If 1^2 ( ^ 15 C_1) + 2^2 ( ^ 15 C_2) + 3^2 ( ^ 15 C_3) + + 15^2 ( ^ 15 C_ 15 ) = 2^m 3^n 5^k, where m, n, k N , then m + n + k is...
- If a curve y = y(x) passes through the point (1, 2 ) and satisfies the differential equation (7x^4 y - e^x cosec y) dx dy = x^5,...