Question 3 Page 68 - Chapter 4 Class 10 - Carbon and its Compounds

What will be the formula and electron dot structure of cyclopentane?

Answer:

Cyclopentane is 

• a 5 carbon (pent) compound, 
• in a cyclic (ring) structure (cyclo) , 
• with single bonded carbons(-ane).

Let’s draw it’s electron dot structure

• To draw its electron dot structure, we will first draw the electron dot structures of 5 carbon atoms, in a ring. 
• Each carbon atom must have 4 more electrons to complete its octet .
• Now, each carbon atom is surrounded by two other carbon atoms.
• Each of the two carbon atoms can share two of their electrons with the neighboring atom, and complete its octet. 
• The same logic is followed by each atom in the ring.

Its electron dot structure will hence look like:

And the formula for cyclopentane is: C ₅ H ₁₀