GEOLOGY

EARTH SCIENCE

GEOCHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Bond angle for bent
A
120o
B
109.5o
C
104.5o
D
107o
Explanation: 

Detailed explanation-1: -In H2O molecule, O has 2 bond pairs and 2 lone pairs . So, the steric number is 4 and the hybridisation is sp3. Hence, the geometry is tetrahedral and the shape is bent with a bond angle of 104.5∘ due to lone pair-lone pair repulsion and lone pair-bond pair repulsions.

Detailed explanation-2: -The shape of water molecule which should be tetrahedral has a bent or distorted tetrahedral shape with a bond angle 104.5o.

Detailed explanation-3: -A water molecule consists of two hydrogen atoms and one oxygen atom. The three atoms make an angle; the H-O-H angle is approximately 104.5 degrees.

Detailed explanation-4: -The bond angle generally depends on the number of lone pairs present in an atom. An atom which has no lone pairs shows a shape of trigonal planar shape and in this case bond angle is of 120∘. The molecule which contains one lone pair which forms a bent shape and bond angle is of 118∘.

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