Which of the following statements is not corr | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The packing fraction of a lattice structure is defined as the fraction of the total volume occupied by the atoms in a unit cell.For a primitive cu

Vedclass · Accepted Answer

The number of carbon atoms in a unit cell of diamond is $8$.

Vedclass · Answer

(A) The packing fraction of a lattice structure is defined as the fraction of the total volume occupied by the atoms in a unit cell.For a primitive cubic unit cell,the number of atoms per unit cell $(z)$ is $1$ and the edge length $(a)$ is $2r$.Packing fraction $= \frac{z 	imes \frac{4}{3} \pi r^{3}}{a^{3}} = \frac{1 	imes \frac{4}{3} \pi r^{3}}{(2r)^{3}} = \frac{\pi}{6} \approx 0.52$.Statement $A$ is incorrect because a diamond unit cell contains $8$ carbon atoms,not $4$. However,in the original options provided,statement $C$ stated $0.48$,which is also incorrect. Given the standard chemistry context,the number of atoms in a diamond unit cell is $8$ (making $A$ incorrect),and the packing fraction of a primitive cell is $0.52$ (making the original $C$ incorrect). Assuming the question asks for the incorrect statement,$A$ is the most fundamentally incorrect statement regarding the diamond structure.

List-$I$ (Type of solid)	List-$II$ (Example)
$(A)$ Metallic	$(1)$ Diamond
$(B)$ Ionic	$(2)$ Ice
$(C)$ Molecular	$(3)$ $NaCl$
$(D)$ Covalent	$(4)$ $Cu$

Which of the following statements is not correct?

Similar Questions

Solid methane is

Find the volume occupied by a particle in a simple cubic unit cell if the radius of a particle in it is $190 \text{ pm}$.

Match List-$I$ with List-$II$ based on the type of solid and its example:
List-$I$ (Type of solid) List-$II$ (Example)
$(A)$ Metallic $(1)$ Diamond
$(B)$ Ionic $(2)$ Ice
$(C)$ Molecular $(3)$ $NaCl$
$(D)$ Covalent $(4)$ $Cu$

Silicon is

What are molecular solids? State its types.

Vedclass Test Series

Exam Paper Generator

Online Exam Module