BITSAT 2019 Slot 2 Solved Paper

Let atoms of Y in ccp structure =100
Then, number of tetrahedral voids =2×100
∵ Number of X atoms =

2

3

rd of tetrahedral voids
∴ Number of X atoms =

2

3

×200=

400

3

Thus,

X

Y

=

400

3×100

=

400

300

=

4

3

Hence, formula of compound can be =X4Y3.