Of the following,the most acidic is

Which of the following elements forms $p\pi-p\pi$ bond with itself?

What are the number of $P - O - P$ bridges in phosphorus pentoxide and phosphorus trioxide,respectively?

Phosphine is produced by adding water to

In the following reaction,identify the nature of the product formed by the underlined atom upon complete hydrolysis at $R.T$.:
$H_4\underline{P}_2O_8 + H_2O \longrightarrow H_3PO_4 + H_2O_2$

The product formed in the reaction of $SOCl_2$ with white phosphorus is: