MHT CET202123 Sep 2021Morning ShiftChemistrySolid StateActual
A metal has BCC structure with edge length of unit cell 400 pm . Density of metal is 4 ~g ~cm ⁻³ What is molar mass of metal?
Options
- A40 ~g ~mol ⁻¹
- B27 ~g ~mol ⁻¹
- C92 ~g ~mol ⁻¹
- D77 ~g ~mol ⁻¹
Correct answer
D. 77 ~g ~mol ⁻¹
Step-by-step solution
aligned & d = ZM N _ A a ^3 & a =400 pm & =400 10⁻¹⁰ ~cm & =4 10⁻⁸ ~cm & Z =2 for BCC & 4= 2 M 6.022 10²³ (4 10⁻⁸ )^3 & M = 4 6.022 10²³ 64 10⁻²⁴ 2 & =77 ~g ~mol ⁻¹ aligned