## Question

### Solution

Correct option is

AB

A atom are at eight corners of the cube. Therefore, the number of A atoms in the unit cell = 8/8 = 1, atoms B per unit cell = 1, Hence, the formula is AB.

#### SIMILAR QUESTIONS

Q1

Calcium metal crystallizes in fcc lattice with edge length 556 pm. Calculate the density (in g cm-3) of metal if it contains 0.2% Schottky defects.

Q2

Which of the following statements about amorphous solids is incorrect?

Q3

An alloy of Cu, Ag and Au is found to have Cu forming the simple cubic closed packed lattice. If the Ag atoms occupy the face centres and Au is present at the body centre, the formula of the alloy will be

Q4

If the radius ratio is in the range of 0.414 – 0.732, then the coordination number will be

Q5

Quartz is a crystalline variety of

Q6

X – ray analysis shows that the unit cell length in NaCl is 562.8 pm. Calculate the density you would expect on this basis,

NA = 6.023 × 1023 mol-1.

Q7

If the distance between Na+ and Cl- ions in NaCl crystal is ‘a’ pm what is the length of the cell edge?

Q8

A crystalline solid

Q9

The three states of matter are solid, liquid and gas. Which of the following statement is/are true about them?

Q10

Under which category iodine crystals are placed among the following?