1.

A solid has a strcture in which 'W' atoms are located at the corners of a cubic lattice 'O' atoms at the centre of edges and 'Na' atoms at the centre of the cube. The formula for the compound is

Answer»

`NaWO_(2)`
`NaWO_(3)`
`Na_(2)WO_(3)`
`NaWO_(4)`

SOLUTION :In a unit cell, W atoms at the corner `=(1)/(8)xx8=1`
O atoms at the centre of edges `=(1)/(4)xx12=3`
Na atoms at the centre of the cube=1
`W:O:Na=1:3:1`, hence formula =`NaWO_(3)`


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