JEE Main questions
34495 published questions with worked solutions.
- What is the mole fraction of water in 10% by weight (w/w) of aqueous urea solution? [Given: Molar mass of H, O, C and N are 1,...
- Arrange the following resultant mixtures in increasing order of their pH values: A. 10 mL 0.2 M Ca(OH)₂ + 25 mL 0.1 M HCl B. 10...
- First order gas phase reaction A→B+C. pᵢ=initial pressure of gas A, pₜ=total pressure of the reaction mixture at time t....
- Given below are two statements: Statement I: The correct order of electronegativity of fluorine, oxygen and nitrogen is F>O>N....
- Correct statements from the following are: A. Nitrogen in oxidation states from +1 to +4 disproportionates in acid medium. B....
- The correct statements about metal carbonyls are: A. The metal-carbon bonds in metal carbonyls possess both σ and π-character. B....
- Given below are two statements: Statement I: Each electron in eg orbitals destabilizes the orbitals by +0.6Δₒ and each electron...
- Given below are two statements: Statement I: On the basis of inductive effect, the order of stability of alkyl carbanions is CH₃⁻...
- Benzyl isocyanide can be obtained from: A. PhCH₂Br + AgCN. B. PhCH₂NH₂ + CHCl₃/aq. NaOH. C. PhBr + AgCN. D. PhNH₂ + CHCl₃/aq....
- Consider compounds A, B and C: A = CH₃CH₂CH₂CH₂CH₂OH, B = CH₂=CHCH₂CH₂CH₃, C = HOCH₂CH₂CH(OH)CH₃. For the conversion of B from A,...
- Identify the incorrect statements. A. Benzylamine is a stronger base than aniline. B. p-Methoxyaniline can be synthesized by...
- Identify the correct statements. A. Glucose exists in two anomeric forms. B. Anomers of glucose differ in configuration at C−1 in...
- Given below are two statements: Statement I: Sodium dichromate and potassium dichromate are classified as primary standards in...
- Consider the following species: BrF₅, XeF₅⁻, BF₄⁻, ICl₄⁻, XeF₄, SF₄, NH₄⁺, ClF₃, XeF₂, ICl₂⁻. Number of species having sp³d...
- In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of BaSO₄. The percentage of sulphur in the...
- One mole of phenol is treated with dilute HNO₃ at 298 K to give a mixture of products. The mixture is separated by steam...
- The values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been...
- If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99% of the reaction will be...
- Let f : ℝ → ℝ be defined as f(x)= 2x^2-3x+2 3x^2+x+3 . Then f is:
- Consider the quadratic equation (n²−2n+2)x²−3x+(n²−2n+2)²=0, n∈ℝ. Let α be the minimum value of the product of its roots and β be...