Question

What are the hybridizations of atoms 1, 2, and 3, respectively in the structure below?

Н O 1 3 (2 Н—N—С С—С ЕС- -о—Н -

	N1	C2	O3
A)	sp3	sp2	sp
B)	sp3	sp	sp2
C)	sp3	sp	sp3
D)	sp2	sp	sp
E)	sp2	sp2	sp3

Answer 1

When electron domain is 2, hybridisation is sp

When electron domain is 3, hybridisation is sp2

When electron domain is 4, hybridisation is sp3

When electron domain is 5, hybridisation is sp3d

When electron domain is 6, hybridisation is sp3d2

1)

N forms 3 single and has 1 lone pair.

So, there are 4 electron domain around O.

This means O is sp3 hybridised

2)

C forms 1 single and 1 triple bond.

So, there are 2 electron domain around C1.

This means C1 is sp hybridised

3)

O forms 2 single and has 2 lone pairs.

So, there are 4 electron domain around O.

This means O is sp3 hybridised

Answer: C