Practice questions
90156 published questions with worked solutions.
- The heat extracted out of x gram of water initially at 50°C to cool it down to 0°C is sufficient to evaporate (1000−x) gram of...
- A series LCR circuit with R=20Ω, L=1.6H and C=40μF is connected to a variable frequency a.c. source. The inductive reactance at...
- When an external resistance of 5Ω is connected across terminals of a cell, a current of 0.25 A flows through it. When the 5Ω...
- A circular loop of radius 20 cm and resistance 2Ω is placed in a time varying magnetic field B=(2t^2+2t+3) T. At t=0, for the...
- 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...
- Given below are two statements: Statement I: Heating benzamide with bromine in an ethanolic solution of sodium hydroxide will...
- Given below are two statements: Statement I: The two cyclic forms of D-(+)-glucose (α and β anomers differing at C1 hydroxyl...
- A paper dipped in a dil. H₂SO₄ solution of 'X' upon treatment with SO₂ gas turns into green. The compound 'X' is: