Question

Why is the hsh angle in h2s close to 90 while in hoh is 105?

Answer 1

Bond angle is directly proportional to electronegativity of central atom. as electronegativity of O is more than S so bond angle of H2O more than H2S. Due to more electronegativity of oxygen electron cloud shift towards it and this lead to increase in b.p-b.p repulsion.
The bond angle in water is about 105 degrees which is predicated on the tetrahedral bond angle (109.5). But in H2S the bond angle is around 92 degrees. Both molecules are polar and exhibit dipole-dipole attractions, but in addition, water exhibits stronger hydrogen bonding.

Answer 2

Step-by-step explanation:

$</p><p>k = {\color{red}x} \mathbin{\color{blue}-} 2$