HARD
Chemistry
IMPORTANT
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O2 undergoes photochemical dissociation into 1 a normal oxygen atom O and a more energetic oxygen atom O*. If O has 1.967 eV more energy than O and normal dissociation energy of O2 is 498 kJ mol-1, what is the maximum wavelength effective for the photochemical dissociation of O2?

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Important Questions on Structure of Atom

HARD
Chemistry
IMPORTANT
The approximate size of the nucleus of  Ni2864 is:
MEDIUM
Chemistry
IMPORTANT

Suppose that a hypothetical atom gives a red, green, blue and violet line. Which electron jump would give off the red spectral line according to figure ?

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HARD
Chemistry
IMPORTANT
The total number of nodes are same in:
HARD
Chemistry
IMPORTANT
What is the number of waves made by an electron moving in an orbit having the maximum magnetic quantum number, ml=+3?
MEDIUM
Chemistry
IMPORTANT
What is the degeneracy of the level of H-atom that has the energy -RH9?
HARD
Chemistry
IMPORTANT
For a 3s orbital ψ3s=1931a01/26-6σ+σ2ψ-σ/2
Where σ=2Zr3a0. What is the maximum radial distance of node from nucleus?
MEDIUM
Chemistry
IMPORTANT

Consider the following statements:

(a) Electron density in the XY plane in 3dx2-y2 orbital is zero

(b) Electron density in the XY plane in 3dz2 orbital is zero.

(c) 2s orbital has one nodal surface.

(d) 2pz orbital, XY is the nodal plane.

From the above statements, which are incorrect statements?

HARD
Chemistry
IMPORTANT
If n and l are respectively the principal and azimuthal quantum numbers, then the expression for calculating the total number of electrons in any orbit is-