Chemistry questions
29404 published questions with worked solutions.
- In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
- Which of the following species exhibits the diamagnetic behaviour?
- The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing...
- A 5.25% solution of a substance is isotonic with a 1.5% solution of urea ( molar mass = 60 g mol^ -1 ) in the same solvent. If...
- Identify the correct statement regarding a spontaneous process
- In conversion of lime-stone to lime, CaCO_3(s) CaO(s) + CO_2(g) the vales of H^ and S^ are +179.1 kJ mol^ -1 and 160.2 J/K...
- The pKa of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which 50% of the acid is ionized is
- In a sautrated solution of the sparingly soluble strong electrolyte AgIO_3 (Molecular mass = 283) the equilibrium which sets in...
- The first and second dissociation constants of an acid H_2A are 1.0 10^ -5 and 5.0 10^ -10 respectively. The overall dissociation...
- Which one of the following conformation of cyclohexane is chiral?
- The reaction of toluene with Cl_2 in presence of FeCl_3 gives predominantly
- Presence of a nitro group in a benzene ring
- A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of 290 mm at 300 K. The vapour pressure of propyl alcohol is...
- The cell, Zn|Zn^ 2+ (1M)||Cu^ 2+ (1M)|Cu (E^0_ cell = 1.10 V), was allowed to be completely discharged at 298 K. The relative...
- The equivalent conductances of two strong electrolytes at infinite dilution in H_2O (where ions move freely through a solution)...
- The energies of activation for forward and reverse reactions for A_2 + B_2 2AB are 180 kJ mol^ -1 and 200 kJ mol^ -1...
- Consider the reaction, 2A + B Products When concentration of B alone was doubled, the half-life did not change. When the...
- The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because
- Which of the following reactions will yield 2, 2−dibromopropane?
- Which of the following is the correct order of decreasing SN^2 reactivity?