Chemistry questions
29404 published questions with worked solutions.
- First ionisation enthalpy values of first four group 15 elements are given below. Choose the correct value for the element that...
- Consider the following low-spin complexes K_3[Co(NO_2)_6], K_4[Fe(CN)_6], K_3[Fe(CN)_6], Cu_2[Fe(CN)_6] and Zn_2[Fe(CN)_6]. The...
- In the Claisen-Schmidt reaction to prepare, dibenzalacetone from 5.3 g benzaldehyde, a total of 3.51 g of product was obtained....
- Total number of non bonded electrons present in NO_2^- ion based on Lewis theory is _____.
- Arrange the following in order of magnitude of work done by the system/on the system at constant temperature. (a) |w_ reversible...
- Which among the following molecules is (a) involved in sp^3d hybridization, (b) has different bond lengths and (c) has lone pair...
- Formation of Na_4[Fe(CN)_5NOS], a purple coloured complex formed by addition of sodium nitroprusside in sodium carbonate extract...
- Electronic configuration of four elements A, B, C and D are given below : (A) 1s^2 2s^2 2p^3 (B) 1s^2 2s^2 2p^4 (C) 1s^2 2s^2...
- A tetrapeptide, "x" on complete hydrolysis produce glycine (Gly), alanine (Ala), valine (Val), leucine (Leu) in equimolar...
- Given below are two statements: Statement (I): Neopentane forms only one monosubstituted derivative. Statement (II): Melting...
- The nature of oxide (TeO_2) and hydride (TeH_2) formed by Te, respectively are:
- The type of hybridization and the magnetic property of [MnCl_6]^ 3- are,
- Consider the following chemical equilibrium of the gas phase reaction at a constant temperature: A(g) B(g) + C(g) If p being the...
- When 1 g each of compounds AB and AB_2 are dissolved in 15 g of water separately, they increased the boiling point of water by...
- 0.2% (w/v) solution of NaOH is measured to have resistivity 870.0 mΩ m. The molar conductivity of the solution will be _____ ×...
- The spin-only magnetic moment value of Mn^+ ion formed among Ni, Zn, Mn and Cu that has the least enthalpy of atomisation is...
- A solution is made by mixing one mole of volatile liquid A with 3 moles of volatile liquid B. The vapour pressure of pure A is...
- The correct order of basic nature in aqueous solution for the bases NH₃, H₂N – NH₂, CH₃CH₂NH₂, (CH₃CH₂)₂NH and (CH₃CH₂)₃N is :
- Among SO₂, NF₃, NH₃, XeF₂, ClF₃ and SF₄, the hybridization of the molecule with non-zero dipole moment and highest number of...
- Given below are two statements : Statement (I) : In octahedral complexes, when Δ₀ < P high spin complex are formed. Statement...