The crystal is bounded by plane faces (f), straight edges (e), and interfacial angles (c). The relationship between these is:

JEE Main Chemistry question

Not in JEE Main or NEET syllabus

The crystal is bounded by plane faces (), straight edges (), and interfacial angles (). The relationship between these is:

(A)Correct
(B)
(C)
(D)None of these

Answer: (A)

Solution

For any crystal (treated as a convex polyhedron), the number of plane faces plus the number of interfacial angles exceeds the number of straight edges by exactly 2, i.e. — an Euler-type relation

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-141646