Question

Arrange them in ascending order of bond angles.
NH3,CO2,H2O,CH4

Answer 1

H2O<NH3<CH4<CO2

NH3 is better known as ammonia to us, CO2 as carbon di-oxide, H2O as water and CH4 as methane.

The bond angle according to the theory of VSEPR is the angle between the two electron bonds.

The number of lone pairs of electron in H2O is 2, where as it is one in NH3 and none in CH4.

Answer 2

H2O<NH3<CH4<CO2

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