Q)
The molal freezing point depression constant for benzene $(C_6H_6$) is 4.90 K kg $mol^{–1}$. Selenium exists as a polymer of the type ***. When 3.26 g of selenium is dissolved in 226g of benzene, the observed freezing point is 0.112$^{\large\circ}$C lower than that of pure benzene. Deduce the value of x. (Atomic mass of Se = 78.8 g $mol^{–1}$)
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