Chemistry questions
29404 published questions with worked solutions.
- Identify the correct statements. A. Glucose exists in two anomeric forms. B. Anomers of glucose differ in configuration at C−1 in...
- Given below are two statements: Statement I: Sodium dichromate and potassium dichromate are classified as primary standards in...
- Consider the following species: BrF₅, XeF₅⁻, BF₄⁻, ICl₄⁻, XeF₄, SF₄, NH₄⁺, ClF₃, XeF₂, ICl₂⁻. Number of species having sp³d...
- In an estimation of sulphur by Carius method 0.2 g of the substance gave 0.6 g of BaSO₄. The percentage of sulphur in the...
- One mole of phenol is treated with dilute HNO₃ at 298 K to give a mixture of products. The mixture is separated by steam...
- The values of pressure equilibrium constant recorded at different temperatures for the following equilibrium reaction have been...
- If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99% of the reaction will be...
- 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:...