A solid has a structure 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 cannot be
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a
Na2WO3
b
Na2WO2
c
NaWO2
d
NaWO3
answer is A.
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Detailed Solution
In a unit cell, W atoms at the corner =18×8=1O-atoms at the centre of edges =14×12=3Na-atoms at the centre of the cube = 1W:O:Na = 1 : 3 : 1Hence, formula = NaWO3