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Practice Online Test Series for JEE Main 2018 & NEET 2018
For an endothermic reaction, where `triangleH` represetns the enthalpy of the reaction, the minimum value for the energy of activation will be :–
The binding energy of an electron in the ground state of the He atom is equal to 24 eV. The energy required to remove both the electrons from the atom will be :–
The correct hond order of S—O bond in decreasing order is :–
Among `KO_2, AlO_2 ^ -, BaO_2` and `NO_2 ^+` one unpaired electron is present in :–
What is A in the following reaction
Which of the following contain N—N bond `N_2O_4 , N_2O_5, N_2O_3`
Rate constant of any reaction with 20% complete in 10 min is
Which of the following will not show tautomerism ?
What will be the value of relative lowering of vapour pressure when 3 g urea is dissolved in 45 g of water
0.5 g of a metal on oxidation give 0.79 g of its oxide. The equivalent weight of the metal is
Which of the following forms cationic micelles above certain concentration ?
The half-life time of a first order reaction is `1.26×10^14` s, then rate consant of this reaction will be :
A plot of log `x/m` versus log p for adsorption of a gas on solid gives a straight line with slope equal to
`triangleEº` of combustion of isobutylene is –x kj `mol^(–1)`. The value of `triangleHº` is :
In the reaction, , a is that part of `N_2O_4` whcih dissociates, then the number of moles at equilibrium will be :
For antifluorite structure coordination number of cations and anions are respectively
Packing fraction of simple cubic crystal lattice is
Which of the following order is correct regarding rate of diffusion of gases ?
How much time is required to do the electroplating of Ag layer on a coffee tray (30 cm × 15 cm) to a thickness of 1 mm using a constant current of 1.0 A. Given that density of Ag is 10.5 g/c`m^3`
Among the following which one is not a redox reaction
, a is that part of `N_2O_4` whcih dissociates, then the number of moles at equilibrium will be :
