Q16 / 90 · JEE Main 2014 (09 Apr Online) · Chemistry

In a face centered cubic lattice atoms A are at the corner points and atoms B at the face centered points. If atom B is missing from one of the face centered points, the formula of the ionic compound is :

  • A
    A2B3
  • B
    AB2
  • C
    A5B2
  • Correct answer
    D
    A2B5

Solution

A atoms at corners  = 8 × 1 8 =  A (one atom)

B atom is missing at One face centre then will present at 5 faces

At face centre atom contribute 1/2 part

Number of B atom at Face centre = 5× 1 2 (B atom)

So formula of compound = A2B5

Hence, the correct answer is option: 'D'.

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