Predict which out of the following species are planar.
`(i) NH_(4)^(+) (ii)CH_(3)^(+)(ii)SF_(4)(iv)OF_(2)(v)H_(2)O`

Explanation

(i) `NH_(4)^(+) : H=1//2[5+4-1+0]=4=(sp^(3)-"non-planar")`
(ii) `CH_(4)^(+) : H=1//2[4+3-1+0]=6//2=3(sp^(2)-"planar")`
(iii) `SF_(4) : H=1//3[6+4-0+0]=10//2=5(sp^(3)d-"non-planar")`
(iv) `OF_(2) : H=1//2[6+2-0+0]=8//2=4(sp^(3)-"non-planar")`
(v) `H_(2)O: H=1//2[6+2-0+0]=8//2=4(sp^(3)-"non-planar")`