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White Phosphorus on reaction with concentrated

Question:

White Phosphorus on reaction with concentrated $\mathrm{NaOH}$ solution in an inert atmosphere of $\mathrm{CO}_{2}$ gives phosphine and compound $(\mathrm{X}) .(\mathrm{X})$ on acidification with $\mathrm{HCl}$ gives compound (Y). The basicity of compound (Y) is :

  1. 4

  2. 1

  3. 2

  4. 3


Correct Option: , 2

Solution:

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