Bond angle in `NH_3` is more than in `H_2O`. Justify.

In the following question, an Assertion (A) is followed by a corresponding Reason (R). Use the following keys to choose the appropriate answer. Assertion : Bond angle of H_2S is smaller than H_2O in gas phase. Reason : Electronegativity of the central atom increases, bond angle decreases.

Bond angle in is PH_4^+ higher than that in PH_3

Account for the following: i) 'NF_3' is pyramidal while 'BF_3' is trigonal planar. ii) Bond angle in 'H_2 O' is larger than bond angle in 'H_2 S'.

Although geometries of NH_3 and H_2O moluecules are distorted tetrahedral, bond angle in water is less than that in ammonia. Discuss.

Assertion : H-S-H bond angle in H_2S is closer to 90^@ but: H-O-H bond angle in H_2O is 104.5^@ . Reason : lp-lp repulsion is stronger in H_2S than in H_2O .

Assertion : The O-O bond length in H_2O_2 is shorter than that of O_2F_2 Reason : H_2O_2 is an ionic compound.

i Why HF acid is stored in wax coated glass bottles? ii Iodine is more soluble in KI than in 'H2O'. Why?

Although geometries of NH_3 and H_2O molecules are distorted tetrahedral,bond angle in water is less than that of ammonia.Discuss.

The 'H-S-H' bond angle in 'H_2 S' is '92 . 2.whereas the 'H-O-H' bond angle in 'H_2 O' is '.104 .5, why?