Advertisements
Advertisements
Define equivalent mass.
Concept: undefined >> undefined
The energy of light of wavelength 45 nm is
Concept: undefined >> undefined
Advertisements
The energies E1 and E2 of the two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths ie λ1 and λ2 will be
Concept: undefined >> undefined
Based on equation E = `-2.178 xx 10^(-18) "J" ("z"^2/"n"^2)`, certain conclusions are written. Which of them is not correct?
Concept: undefined >> undefined
Which of the following pairs of d-orbitals will have electron density along the axes?
Concept: undefined >> undefined
Two electrons occupying the same orbital are distinguished by __________.
Concept: undefined >> undefined
Assertion: Number of radial and angular nodes for 3p orbital are 1, 1 respectively.
Reason: Number of radial and angular nodes depends only on principal quantum number.
Concept: undefined >> undefined
What is the maximum numbers of electrons that can be associated with the following set of quantum numbers?
n = 3, l = 1 and m = –1
Concept: undefined >> undefined
The total number of orbitals associated with the principal quantum number n = 3 is
Concept: undefined >> undefined
Consider the following sets of quantum numbers:
| n | l | m | s | |
| (i) | 3 | 0 | 0 | `+1/2` |
| (ii) | 2 | 2 | 1 | `-1/2` |
| (iii) | 4 | 3 | –2 | `+1/2` |
| (iv) | 1 | 0 | –1 | `+1/2` |
| (v) | 3 | 4 | 3 | `-1/2` |
Which of the following sets of quantum number is not possible?
Concept: undefined >> undefined
Electron density in the yz plane of 3dxy orbital is
Concept: undefined >> undefined
Which quantum number reveal information about the shape, energy, orientation and size of orbitals?
Concept: undefined >> undefined
How many orbitals are possible for n = 4?
Concept: undefined >> undefined
How many radial nodes for 2s, 4p, 5d and 4f orbitals exhibit? How many angular nodes?
Concept: undefined >> undefined
The stabilisation of a half-filled d-orbital is more pronounced than that of the p-orbital why?
Concept: undefined >> undefined
If x is the fraction of PCl5 dissociated at equilibrium in the reaction
\[\ce{PCl5 <=> PCl3 + Cl2}\]
then starting with 0.5 mole of PCl5, the total number of moles of reactants and products at equilibrium is
Concept: undefined >> undefined
In the reaction
\[\ce{Fe(OH)3(S) <=> Fe^{(3+)} (aq) + 3OH- (aq)}\]
if the concentration of OH– ions is decreased by 1/4 times, then the equilibrium concentration of Fe3+ will
Concept: undefined >> undefined
Equimolar concentrations of H2 and I2 are heated to equilibrium in a 1 liter flask. What percentage of the initial concentration of H2 has reacted at equilibrium if the rate constant for both forward and reverse reactions are equal
Concept: undefined >> undefined
Protons can be accelerated in particle accelerators. Calculate the wavelength (in Å) of such accelerated proton moving at 2.85 × 108 ms−1 (the mass of proton is 1.673 × 10−27 Kg).
Concept: undefined >> undefined
The electronic configuration of the elements A and B are 1s2, 2s2, 2p6, 3s2 and 1s2, 2s2, 2p5 respectively. The formula of the ionic compound that can be formed between these elements is
Concept: undefined >> undefined
