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White phosphorous is a tetra atomic solid P4 at room temperature given ΔHsublimation of P4s=59KJ/molP4s=59KJ/mol of P4g=1265KJ/mol Then wavelength of light capable of breaking P-P bond is x×10−7 meter then is

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answer is 5.94.

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Detailed Solution

P4 has 6 P-P bondsΔHnet=ΔHatomisation +ΔHsublimation =1265+59=1324KJmol-1 But ΔHnet =6εP-P6εp-p=1324εp-p=13246=201KJ/molE=hcλ⇒λ=6.625×10−34×3×108×6×1023201×103=5.94×10−7m

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White phosphorous is a tetra atomic solid P4 at room temperature given ΔHsublimation of P4s=59KJ/molP4s=59KJ/mol of P4g=1265KJ/mol Then wavelength of light capable of breaking P-P bond is x×10−7 meter then is