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JEE Main 201910 AprilEvening Shift

Exam: JEE Main
Year: 2019
Date: 10 April
Shift: Evening Shift
Subject: Chemistry
Chapter: p Block Elements (Group 13 & 14)

JEE Main 2019 · 10 April · Evening Shift · Chemistry · p Block Elements (Group 13 & 14)

The number of pentagons in C _ 60 and trigons (triangles) in white...

The number of pentagons in

{C}_{60}

and trigons (triangles) in white phosphorus, are; The number of pentagons in C _ 60 and trigons (triangles) in white phosphorus, are;

The number of pentagons in C _ 60 and trigons (triangles) in white phosphorus, are;

Options

A $12$ and $3$
B $20$ and $4$
C $20$ and $3$
D $12$ and $4$

Correct answer

D. $12$ and $4$

Step-by-step solution

{C}_{60}

is a molecule that consists of

60 - C

atoms, arranged as

12

pentagons and

20

hexagons.

The number of pentagons in C _ 60 and trigons (triangles) in white phosphorus, are;

It has

4

trigons.

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