The figure shows energy levels of a certain atom, when the system moves from level 2E to E, a photon of wavelength is emitted. The wavelength of photon produced during its transition from level 4/3 E to E level is:

An  α-Particle of energy 5 Mev is scattered through 180 by a fixed uranium nuclear The closest distance is in the order of:

Species having zero dipole moment:

Which of the following process are associated with change of hybridization of the underlined compound?
1) Al(OH)₃ ppt. dissolved in NaOH
2) B2H₆ is dissolved in THF
3) SiF₄ vapour is passed through liq. HF
4)Solidification PCl₅ vapour Correct answer is-

The shapes of XeF₄,XeF₅–and SnCl₂ are-

Linear structure is assumed by-
I)NCO^–
II) CS₂
III) NO₂
IV)Solid BeH

Which of the following set is not correct-

The As F₅ molecule is trigonal bipyramidal. The hybrid orbitals used by the As atoms for bonding-

In [Fe(CO)₅], hybrid is at ion state and number of co-ordinate bonds are-

The condition that the equation can take the form  when shifting the origin is

When the roots are equal and real, then the discriminant value of the the quadratic equation becomes 0.

Compound with the highest melting point is-

In the Born-Haber cycle for the formation of solid common salt (NaCl), the largest contribution comes from-

Which of the following molecule is having complete octet-

In a homonuclear molecule which of the following set of orbitals are degenerate?

MolecularorbitalelectronicconfigurationofBe2, willbe-
a)KK, σ2s²
b)KK,σ2s²,σ*2s²
c)σ1s²,σ*1s²,σ2s²,σ*2s²
d)σ1s²,σ*1s²,σ2s²,2p²Correctansweris-

Which of the following species will have the minimum bond energy: