Chemistry questions
29404 published questions with worked solutions.
- A D-aldotetrose on oxidation with concentrated HNO₃ resulted in optically inactive dicarboxylic acid. The structure of the...
- Among Fe³⁺, Pb²⁺, Cu²⁺ and Mn²⁺, identify the one that gets precipitated out while passing H₂S in presence of NH₄OH as group...
- Match the LIST-I with LIST-II List-I (Compound): A. Cyclohexanol, B. Cyclohexylamine, C. Cyclohexanecarbaldehyde, D. Phenol...
- If 3.365 g of ethanol (l) is burnt completely in a bomb calorimeter at 298.15 K, the heat produced is 99.472 kJ. The |ΔH_f°| of...
- For the following reaction at 50°C and at 2 atm pressure, 2N₂O₅(g) ⇌ 2N₂O₄(g) + O₂(g), N₂O₅ is 50% dissociated. The magnitude of...
- An electrochemical cell, consist of the following two redox couples, Mˣ⁺(aq)/M(s) [E°red=+0.15 V] and Fe³⁺(aq)/Fe(s)...
- For a first order reaction A → B: | t/min | [A]/M | |---|---| | 0 | 0.6500 | | x | 0.0650 | | 20 | 0.00065 | x = _______ min....
- Which of the following statement(s) is/are true? A. If two orbitals have the same value of (n+l), the orbital with lower value of...
- The covalent radii of atoms A and B are r_A and r_B, respectively. The covalent bond length and total length of AB molecule are...
- Consider the following data for the reaction X₂(g)+Y₂(g)⇌2XY(g) at 600 K. | Compound | ΔfH°₆₀₀K (kJ mol⁻¹) | S°₆₀₀K (J mol⁻¹K⁻¹)...
- The correct order of molar heat capacities measured at 298 K and 1 bar is:
- The reaction A(g)⇌B(g)+C(g) was initiated with the amount 'a' of A(g). At equilibrium it is found that the amount of A(g)...
- One half cell in a voltaic cell is constructed by dipping silver rod in AgNO₃ solution of unknown concentration, other half cell...
- Given below are two statements: Statement I: The number of pairs among [Al₂O₃, Cr₂O₃], [Cl₂O₇, Mn₂O₇], [Na₂O, V₂O₃] and [CO, N₂O]...
- Given below are two statements: Statement I: Presence of large number of unpaired electrons in transition metal atoms results in...
- Identify the correct statements from the following: A. [Fe(C₂O₄)₃]³⁻ is the most stable complex among [Fe(OH)₆]³⁻, [Fe(C₂O₄)₃]³⁻...
- Match List-I with List-II. List-I (Purification technique): A. Simple distillation, B. Fractional distillation, C. Steam...
- IUPAC names of some alkenes are given below. Find out the correct stability order. A. 2-Methylbut-2-ene, B. cis-But-2-ene, C....
- Identify the correct IUPAC name of hydrocarbon (X) containing three primary carbon atoms and with molar mass 72 g mol⁻¹.
- Given below are two statements: Statement I: The condensation reaction between CH₃−CH=O and H₂N−NH−C(=O)−NH₂ under optimum pH...