JEE Main questions
34495 published questions with worked solutions.
- Freezing point of a 4% aqueous solution of X is equal to freezing point of 12% aqueous solution of Y. If molecular weight of X is...
- The metal d-orbitals that are directly facing the ligands in K_3[Co(CN)_6] are:
- Poly β-hydroxybutyrate-co-β-hydroxyvalerate (PHBV) is a copolymer of:Not in JEE Main or NEET syllabus
- Decomposition of X exhibits a rate constant of 0.05 μg/year. How many years are required for the decomposition of 5 μg of X into...
- Among the following compounds most basic amino acid is:
- The standard electrode potential E° and its temperature coefficient ( dE° dT ) for a cell are 2 V and -5 10^ -4 VK^ -1 at 300 K...
- Water samples with BOD values of 4 ppm and 18 ppm, respectively are:Not in JEE Main or NEET syllabus
- In a chemical reaction, A + 2B ⇌ 2C + D, the initial concentration of B was 1.5 times of the concentration of A, but the...
- Mn_2(CO)_ 10 is an organometallic compound due to the presence of:
- Two solids dissociate as follows: A(s) ⇌ B(g) + C(g); K_ p_1 = x atm^2 and D(s) ⇌ C(g) + E(g); K_ p_2 = y atm^2. The total...
- In the Hall-Heroult process, aluminium is formed at the cathode. The cathode is made out of:Not in JEE Main or NEET syllabus
- The maximum area (in sq. units) of a rectangle having its base on the x-axis and its other two vertices on the parabola, y = 12 -...
- Let S = 1, 2, 3, …, 100 . The number of non-empty subsets A of S such that the product of elements in A is even is:
- If z - z + (α ∈ R) is a purely imaginary number and |z| = 2, then a value of α is:
- Let f and g be continuous functions on [0, a] such that f(x) = f(a − x) and g(x) + g(a − x) = 4, then _0^af(x)g(x)dx is equal to:
- The sum of the distinct real values of μ, for which the vectors, i + j + k, i + j + k, i + j + k are co-planar, is:
- If the vertices of a hyperbola be at (−2, 0) and (2, 0) and one of its foci be at (−3, 0), then which one of the following points...
- If the sum of the deviations of 50 observations from 30 is 50, then the mean of these observations is:
- Let S_k = 1 + 2 + 3 + + k k . If S_1^2 + S_2^2 + + S_ 10 ^2 = 5 12 A, then A is equal to:
- If a variable line, 3x + 4y − λ = 0 is such that the two circles x^2 + y^2 - 2x - 2y + 1 = 0 and x^2 + y^2 - 18x - 2y + 78 = 0...