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Olympiad workbook

Exam: Olympiad workbook
Subject: NSEC
Chapter: Solid State

Olympiad workbook · NSEC · Solid State

A solid comprises of three types of elements, 'P', 'Q' and 'R'. 'P'...

A solid comprises of three types of elements, 'P', 'Q' and 'R'. 'P' forms an FCC lattice in which '

Q

' and '

R

' occupy all the tetrahedral voids and half the octahedral voids respectively. The molecular formula of the solid is

Options

A $\mathrm{P}_2 \mathrm{Q}_4 \mathrm{R}$
B $\mathrm{PQ}_2 \mathrm{R}_4$
C $\mathrm{P}_4 \mathrm{Q}_2 \mathrm{R}$
D $\mathrm{P}_4 \mathrm{QR}$

Correct answer

A. $\mathrm{P}_2 \mathrm{Q}_4 \mathrm{R}$

Step-by-step solution

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