Hardly had he left ………. his brother came.

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#Question id: 20212

#XL - P Chemistry

If the nitrogen atom had electronic configuration 1s⁷, it would have energy lower than that of the normal ground state configuration 1s² 2s₂ 2p³ because the electrons would be closer to the nucleus. Yet, 1s⁷ is not observed because it violates.

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#Question id: 20213

#XL - P Chemistry

The radius of which of the following orbits is same as that of the first Bohr’s orbit of hydrogen atom ?

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#Question id: 20214

#XL - P Chemistry

Radial nodes present in 3s and 2p -orbitals are respectively

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#Question id: 20215

#XL - P Chemistry

Which species possesses pyramidal shape ?

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#Question id: 20216

#XL - P Chemistry

Which of the following does not possesses bond order as CO ?

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#Question id: 20217

#XL - P Chemistry

In which of the following molecule double bond possesses two bispace bond ?