JEE Main questions
34495 published questions with worked solutions.
- In a microscope the objective is having focal length f_0 = 2 cm and eye-piece is having focal length f_e = 4 cm. The tube length...
- Consider the following reactions. PbCl_2 + K_2CrO_4 (Hot solution) A + 2KCl A + NaOH B + Na_2CrO_4 PbSO_4 + 4CH_3COONH_4...
- Which of the following represents the correct trend for the mentioned property? A. F > P > S > B − First Ionization Energy B. Cl...
- A hydrocarbon 'P' (C_4H_8) on reaction with HCl gives an optically active compound 'Q' (C_4H_9Cl) which on reaction with one mole...
- Given below are two statements : Statement I: The number of pairs among [SiO_2, CO_2], [SnO, SnO_2], [PbO, PbO_2] and [GeO,...
- Elements P and Q form two types of non-volatile, non-ionizable compounds PQ and PQ_2. When 1 g of PQ is dissolved in 50 g of...
- An organic compound (P) on treatment with aqueous ammonia under hot condition forms compound (Q) which on heating with Br_2 and...
- An organic compound "P" of molecular formula C_6H_ 12 O_3 gives positive Iodoform test but negative Tollen's test. When "P" is...
- MnO_4^ 2- , in acidic medium, disproportionates to :
- Given below are two statements: Statement I: The number of species among SF_4, NH_4^+, [NiCl_4], XeF_4, [PtCl_4]^ 2- , SeF_4 and...
- Given below are two statements: Statement I: Among [Cu(NH_3)_4]^ 2+ , [Ni(en)_3]^ 2+ , [Ni(NH_3)_6]^ 2+ and [Mn(H_2O)_6]^ 2+ ,...
- Identify correct statement from the following : A. Propanal and propanone are functional isomers. B. Ethoxyethane and...
- Identify the correct statements. A. Arginine and Tryptophan are essential amino acids. B. Histidine does not contain heterocyclic...
- Given below are two statements: Statement I: When an electric discharge is passed through gaseous hydrogen, the hydrogen...
- Pre-exponential factors of two different reactions of same order are identical. Let activation energy of first reaction exceeds...
- The pH and conductance of a weak acid (HX) was found to be 5 and 4 10^ -5 S, respectively. The conductance was measured under...
- The positive integer n, for which the solutions of the equation x(x+2)+(x+2)(x+4)+....+(x+2n-2)(x+2n) = 8n 3 are two consecutive...
- Let f : R R be a twice differentiable function such that f''(x) > 0 for all x R and f'(a-1) = 0, where a is a real number. Let...
- Let f(x) = x^3 + x^2 f'(1) + 2xf''(2) + f'''(3), x R. Then the value of f'(5) is:
- If the line x + 4y = 7 , where R, touches the ellipse 3x^2 + 4y^2 = 1 at the point P in the first quadrant, then one of the focal...