Question

plz answer this. plzzz quick

Answer 1

hi friend

in 1st question the ascending order is H2o,H2s,H2te,H2se

in 2nd question the ascending order is Bih3,Sbh3,Ph3,Ash3

I hope this will help u :)

Answer 2

(1)→H2O>H2S>H2Se>H2Te

(2)→PH3>AsH3>SbH3>BiH3

These orders are made by considering EN of central atom
Higher the EN more will be bonded electrons attracted. Which will create more repulsion leading to larger bond angles

Hope you got my point of view