JEE Main questions
34495 published questions with worked solutions.
- The correct statements among the following, for a "chromatography" purification method is:
- Evaluate the following statements related to group 14 elements for their correctness. (A) Covalent radius decreases down the...
- Match List-I with the List-II List-I (Reaction): (A) N₂(g) + O₂(g) → 2NO(g) (B) 2Pb(NO₃)₂(s) → 2PbO(s) + 4NO₂(g) + O₂(g) (C)...
- Consider the given reaction, identify the major product P. CH₃–COOH → (i) LiAlH₄ (ii) PCC (iii) HCN/⁻OH (iv) H₂O/⁻OH, Δ → "P"
- The correct IUPAC name of [PtBr₂(PMe₃)₂] is:
- Match List-I with List-II List-I (Tetrahedral Complex): (A) TiCl₄ (B) [FeO₄]²⁻ (C) [FeCl₄]⁻ (D) [CoCl₄]²⁻ List-II (Electronic...
- The ratio K_P K_C for the reaction: CO(g) + 12O₂(g) ⇌ CO₂(g) is:
- An amine (X) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains...
- For the reaction at 298 K, 2A + B → C, ΔH = 400 kJ mol⁻¹ and ΔS = 0.2 kJ mol⁻¹ K⁻¹. The reaction will become spontaneous above...
- Total number of species from the following with central atom utilising sp² hybrid orbitals for bonding is ............. NH₃, SO₂,...
- Consider the two different first order reactions given below: A + B → C (Reaction 1), P → Q (Reaction 2). The ratio of the half...
- For hydrogen atom, energy of an electron in first excited state is −3.4 eV, K.E. of the same electron of hydrogen atom is x eV....
- Among VO₂⁺, MnO₄⁻ and Cr₂O₇²⁻, the spin-only magnetic moment value of the species with least oxidizing ability is ………………. BM...
- Let A = 1, 2, 3, 4, 5 . Let R be a relation on A defined by xRy if and only if 4x ≤ 5y. Let m be the number of elements in R and...
- If three letters can be posted to any one of the 5 different addresses, then the probability that the three letters are posted to...
- Suppose the solution of the differential equation dy dx = (2 + )x - y + 2 x - 2 y - ( - 4 ) represents a circle passing through...
- If the locus of the point, whose distances from the point (2, 1) and (1, 3) are in the ratio 5 : 4, is ax² + by² + cxy + dx + ey...
- _ n (1^2 - 1)(n - 1) + (2^2 - 2)(n - 2) + + ((n - 1)^2 - (n - 1)) 1 (1^3 + 2^3 + + n^3) - (1^2 + 2^2 + + n^2) is equal to
- A software company sets up m number of computer systems to finish an assignment in 17 days. If 4 computer systems crashed on the...
- If z₁, z₂ are two distinct complex number such that | z_1 - 2z_2 12 - z_1 z_2 | = 2, then