JEE Main questions
34495 published questions with worked solutions.
- The adsorbent used in adsorption chromatography is/are A. silica gel B. alumina C. quick lime D. magnesia Choose the most...
- The correct order of the first ionization enthalpy is
- If an iron (III) complex with the formula [Fe(NH_3)_x(CN)_y]^- has no electron in its e_g orbital, then the value of x + y is
- Fuel cell, using hydrogen and oxygen as fuels, A. has been used in spaceship B. has as efficiency of 40% to produce electricity...
- Choose the Incorrect Statement about Dalton's Atomic Theory
- Match List-I with List-II List-I: A. α-Glucose and α-Galactose B. α-Glucose and β-Glucose C. α-Glucose and α-Fructose D....
- Given below are two statements: Statement I: The correct order of first ionization enthalpy values of Li, Na, F and Cl is Na < Li...
- For a strong electrolyte, a plot of molar conductivity against (concentration)^ 1/2 is a straight line, with a negative slope,...
- A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of 3.86 BM. The atomic number of the...
- The number of unpaired d-electrons in [Co(H_2O)_6]^ 3+ is______
- The number of species from the following that have pyramidal geometry around the central atom is________ S_2O_3^ 2- , SO_4^ 2- ,...
- The maximum number of orbitals which can be identified with n = 4 and m = 0 is_____
- Number of compounds/species from the following with non-zero dipole moment is_____ BeCl_2, BCl_3, NF_3, XeF_4, CCl_4, H_2O, H_2S,...
- From 6.55 g of aniline, the maximum amount of acetanilide that can be prepared will be___× 10^ -1 g.
- Consider the following reaction, the rate expression of which is given below A + B → C, rate = k [A]^ 1/2 [B]^ 1/2 . The reaction...
- The total number of 'sigma' and 'Pi' bonds in 2-oxohex-4-ynoic acid is____.
- A first row transition metal with highest enthalpy of atomisation, upon reaction with oxygen at high temperature forms oxides of...
- If the function f(x) = cases 72^x - 9^x - 8^x + 1 2 - 1 + x , & x 0 a _e2 _e3, & x = 0 cases is continuous at x = 0, then the...
- If λ > 0, let θ be the angle between the vectors a = i + j - 3 k and b = 3 i - j + 2 k. If the vectors a + b and a - b are...
- Let C be a circle with radius 10 units and centre at the origin. Let the line x + y = 2 intersects the circle C at the points P...