Chemistry questions
29404 published questions with worked solutions.
- The hydrogen electrode is dipped in a solution of pH = 3 at 25°C. The potential of the electrode will be – ____ × 10⁻² V....
- Total number of ions from the following with noble gas configuration is ____. Sr²⁺ (z = 38), Cs⁺ (z = 55), La²⁺ (z = 57), Pb²⁺ (z...
- The Spin only magnetic moment of square planar complex [Pt(NH₃)Cl(NH₂CH₃)]Cl is ____ B.M. (Nearest integer) (Given atomic number...
- 1 mole of PbS is oxidised by "X" moles of O₃ to get "Y" moles of O₂. X + Y = ____.
- Given below are two statements : Statement (I) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement...
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) :...
- A solution of two miscible liquids showing negative deviation from Raoult's law will have :
- Consider the following complex ions P = [FeF₆]³⁻ Q = [V(H₂O)₆]²⁺ R = [Fe(H₂O)₆]²⁺ The correct order of the complex ions,...
- Choose the polar molecule from the following :
- The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is :
- Given below are two statements : Statement (I) : Aqueous solution of ammonium carbonate is basic Statement (II) : Acidic/basic...
- Which of the following electronic configuration would be associated with the highest magnetic moment?
- Given below are two statements : Statement (I) : The 4f and 5f - series of elements are placed separately in the Periodic table...
- Sum of bond order of CO and NO⁺ is ________.
- Mass of methane required to produce 22 g of CO₂ after complete combustion is ________ g. (Given Molar mass in g mol⁻¹ C = 12.0, H...
- From the given list, the number of compounds with +4 oxidation state of Sulphur is ________. SO₃, H₂SO₃, SOCl₂, SF₄, BaSO₄, H₂S₂O₇
- 3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible...
- Consider the following data for the given reaction 2 HI(g) → H₂(g) + I₂(g) | Experiment | 1 | 2 | 3 | |---|---|---|---| | HI (mol...
- If three moles of an ideal gas at 300 K expand isothermally from 30 dm³ to 45 dm³ against a constant opposing pressure of 80 kPa,...
- The number of electrons present in all the completely filled subshells having n = 4 and s = +½ is ________. (Where n = principal...