1.

The tatio of close packed atoms to tetrahedral holes in cubic close packingis

Answer»

`1:1`
`1:2`
`1:3`
`2:1`

SOLUTION :In CLOSE packed arrangement number of tetrahedral voids per atom=2.
In CCP lattice atoms =`8 times1/8+6 times1/2=4
`therefore" Tetrahedral voids "= 4 times2=8`
`" Ratio "4:8 i.e. 1:2`.


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