Chemistry questions
29404 published questions with worked solutions.
- 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...
- Correct statements for an element with atomic number 9 are A. There can be 5 electrons for which m_s = + 1 2 and 4 electrons for...
- HA(aq) H^+(aq) + A^-(aq) The freezing point depression of a 0.1 m aqueous solution of a monobasic weak acid HA is 0.20°C the...
- Given below are two statements : Statements-I : A homoleptic octahedral complex, formed using monodentate ligands, will not show...
- Which of the following binary mixture does not show the behaviour of minimum boiling azeotropes?
- The correct decreasing order of spin only magnetic moment values (BM) of Cu^+, Cu^ 2+ , Cr^ 2+ and Cr^ 3+ ions is :
- CH(CH_3)_2 attached to H_2N-CH-COOH, at pH = 2 gives A, at pH = 10 gives B. Choose the correct option for structures of A and B,...