Chemistry questions
29404 published questions with worked solutions.
- What is the correct relationship between the pHs of isomolar solutions of sodium oxide (pH_ 1 ), sodium sulphide (pH_ 2 ), sodium...
- Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction ?
- The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by...
- For a first order reaction A → B, the reaction rate at reactant concentration of 0.01 M is found to be 2.0 x 10^ -5 mol L^ -1 s^...
- The absolute enthalpy of neutralisation of the reaction : MgO(s) + 2HCl(aq) → MgCl_ 2 (aq) + H_ 2 O(l) will be :
- Which one of the following forms micelles in aqueous solution above certain concentration ?Not in JEE Main or NEET syllabus
- Electrolytic reduction of nitrobenzene weakly acidic medium gives :
- Equilibrium constants K_ 1 and K_ 2 for the following equilibria : NO(g)+ 1 2 O_ 2 (g) ; K_ 1 ;NO_ 2 (g) and 2NO_ 2 (g) ; K_ 2...
- Which of the following would have a permanent dipole moment ?
- Which of the following undergoes nucleophilic substitution exclusively by S_ N 1 mechanism?
- The rate of reaction between two reactants A and B decreases by a factor of 4, if the concentration of reactant B is doubled. The...
- In a face-centered cubic lattice, a unit cell is shared equally by how many unit cells ?Not in JEE Main or NEET syllabus
- A solution of urea (mol. mass 56g mol^ -1 ) boils at 100.18°C at the atmospheric pressure. If k_ f and k_ b for water are 1.86...
- Which functional group participates in disulphide bond formation in proteins ?
- Which one of the following is an inner orbital complex as well as diamagnetic in behaviour ? (Atomic no. : Zn = 30, Cr = 24, Co =...
- H_ 2 S gas when passed through a solution of cations containing HCl precipitates the cations of second group of qualitative...
- Which one of the following oxides is expected to exhibit paramagnetic behaviour ?
- Which one of the following is expected to exhibit optical isomerism ? (en = ethylenediamine)
- The energy of second Bohr orbit of the hydrogen atom is -328 kJ mol^ -1 ; hence the energy of fourth Bohr orbit would be :
- The correct order of acid strength is :