Question

(ii) nh3 , ash3 , sbh3 , bih3 , ph3 (decreasing base strength)

Answer 1

Hi there,

Answer: NH3>AsH3>SbH3>BiH3

NH3 is the most basic compound.

#Explanation

The nitrogen atom is more electronegative means it has the strength to attract a bonding pair of electrons toward itself. The size of a central atom of nitrogen is smaller than other given compounds. Increase in electron density of NH3 will increase the basicity.

BiH3 is the least base because the size of a central atom of BiH3 is much larger than nitrogen.

Hope it helps