1.

If all the atoms, on the shaded plane are removed then the molecular formula of the solid will be

Answer»

`A_(5)B_(7)`
`A_(7)B_(5)`
`AB`
`A_(3)B_(4)`

Solution :Edges removed `2 xx 1/4 = 1/2`. Body centres removed `1 xx 1 = 1/(3/2)`, .B. remaining `5/2`. Corners Removed `4 xx 1/8 = 1/2`. Face centres removed `2 xx 1/2 =1/(3/2)`. .A. remaining `5/2`, `therefore` The formula is A.B


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