Practice questions
88551 published questions with worked solutions.
- In an experiment with a closed organ pipe, it is filled with water by ( 1 5 )th of its volume. The frequency of the fundamental...
- Distance between object and its image (magnified by - 1 3 ) is 30 cm. The focal length of the mirror used is ( x 4 ) cm, where...
- A circular ring and a solid sphere having same radius roll down on an inclined plane from rest without slipping. The ratio of...
- An organic compound (X) with molecular formula C_3H_6O is not readily oxidised. On reduction it gives C_3H_8O (Y) which reacts...
- Statement-I : The dipole moment of CH_3-CH=CH-CH=O (crotonaldehyde) is greater than CH_3-CH_2-CH_2-CH=O (butanal) Statement-II :...
- Given below are the pairs of group 13 elements showing their relation in terms of atomic radius. (B < Al), (Al < Ga), (Ga < ln)...
- Statement I: Nitrogen forms oxides with +1 to +5 oxidation states due to the formation of pπ - pπ bond with oxygen. Statement II:...
- Identify the pair of reactants that upon reaction, with elimination of HCl will give rise to the dipeptide Gly-Ala.
- Rate law for a reaction between A and B is given by r = k[A]^n[B]^m. If concentration of A is doubled and concentration of B is...
- Which of the following molecule(s) show/s paramagnetic behavior? A. O2 B. N2 C. F2 D. S2 E. Cl2 Choose the correct answer from...
- Which one of the following complexes will have ΔO = 0 and μ = 5.96 B.M ?
- Let us consider a reversible reaction at temperature, T. In this reaction, both ΔH and ΔS were observed to have positive values....
- For A_2 + B_2 2AB, Ea for forward and backward reaction are 180 and 200 kJ mol⁻¹ respectively. If catalyst lowers Ea for both...
- Which one of the following about an electron occupying the 1s orbital in a hydrogen atom is incorrect ? (Bohr's radius is...
- KMnO4 acts as an oxidising agent in acidic medium. "X" is the difference between the oxidation states of Mn in reactant and...
- The pH of a 0.01 M weak acid HX (Ka = 4 × 10⁻¹⁰) is found to be 5. Now the acid solution is diluted with excess of water so that...
- Fortification of food with iron is done using FeSO4.7H2O. The mass in grams of the FeSO4.7H2O required to achieve 12 ppm of iron...
- Let the ellipse 3x^2 + py^2 = 4 pass through the centre C of the circle x^2 + y^2 - 2x - 4y - 11 = 0 of radius r. Let f_1, f_2 be...
- Let A = bmatrix 2 & 2+p & 2+p+q 4 & 6+2p & 8+3p+2q 6 & 12+3p & 20+6p+3q bmatrix If det(adj(adj(3A))) = 2^m 3^n, m, n N, then m +...
- Given below are two statements. Statement I: _ x 0 ( ^ -1 x + _e 1+x 1-x - 2x x^5 ) = 2 5 Statement II : _ x 1 (x^ 2 1-x ) = 1...