(a) how many elements of unsaturation are implied by the molecular formula c₅h₅n? a) 0 b) 1 c) 2 d) 3 e) 4 (b) what two atomic orbitals or hybrid orbitals overlap to form the c-c sigma (s) bond in ethylene? a) c sp³ + c sp³b) c sp³ + c sp²c) c sp² + c sp²d) c sp³ + c pe) c sp² + c p

(a) OPTION E=4

b) option E C sp² + C p

Explanation:

DEGREE OF UNSATURATION = C -H/2 -X/2 +N/2 +1

X IS HALOGENS

5-5/2+1/2+1=  4

b) Ethene comprises of two sp2-hybridized carbon atoms (bound to each other by sigma and two atoms each with hydrogen). The remaining unhybridized carbon p orbitals form a pi bond, giving ethene reactivity