Practice questions
90156 published questions with worked solutions.
- A moving coil of galvanometer when shunted with 2 Ω resistance gives a full scale deflection for a current of 500 mA. When a...
- Two cells of emfs 1 V and 2 V and internal resistance 2 Ω and 1 Ω, respectively connected in parallel, gave a current of 1 A...
- A concave mirror of focal length 10 cm forms an image which is double the size of object when the object is placed at two...
- Which of the following contain the same number of atoms? (Given: Molar mass in g mol⁻¹ of H, He, O and S are 1, 4, 16 and 32...
- The Bohr radius of a hydrogen like species is 70.53 pm. The species and the stationary state (n) are respectively (Given:...
- Given below are two statements: Statement I: The number of compounds among SO₂, SO₃, SF₄, SF₆ and H₂S in which sulphur does not...
- Given is a concentrated solution of a weak electrolyte A_xB_y of concentration 'c' and dissociation constant 'K'. The degree of...
- In a period, the first ionisation enthalpy of the element at extreme left and the negative electron gain enthalpy of the extreme...
- Given below are two statements: Statement I: F₂O<H₂O<Cl₂O is the correct trend in terms of bond angle. Statement II: SiF₄, SnF₄...
- The correct order of first (Δ_iH₁) and second (Δ_iH₂) ionisation enthalpy values of Cr and Mn are: A. Δ_iH₁: Cr>Mn B. Δ_iH₂:...
- Which of the following sequences of hybridisation, geometry and magnetic nature are correct for the given coordination compounds?...
- Given below are two statements: Statement I: A mixture of C₁₂H₂₂O₁₁ (sugar) and NaCl can be separated by dissolving sugar in...
- An optically active alkyl bromide C₄H₉Br, reacts with ethanolic KOH to form major compound [A] which reacts with bromine to give...
- Consider the following organic reaction sequence: propanoic acid (CH₃CH₂COOH) → (i) NH₃/Δ (ii) NaOH/Br₂ (iii) HNO₂/H₂O, 0°C (iv)...
- The number of compounds from the following which can undergo reaction with Br₂/KOH (alcoholic) to give respective products and...
- Consider the following reactions. Total number of electrons in the π bonds and lone pair of electrons in the product (X) is:...
- Treatment of a gas 'X' with a freshly prepared ferrous sulphate solution gives a compound 'Y' as a brown ring. The compounds X...
- An excess of AgNO₃ is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles of...
- An alkane (Y) requires 8 moles of oxygen for complete combustion and on chlorination with Cl₂/hν, (Y) gives only one...
- 500 mL of 0.2 M MnO₄⁻ solution in basic medium when mixed with 500 mL of 1.5 M KI solution, oxidises iodide ions to liberate...