Question

Ethane,Propane,Ethylene,Acetylene (increasing order of molecular weight) [C=12,H=1]​

Answer 1

$\bold{Answer\;:-}$

1. Ethane ( $C_{\text{2}}H_{\text{6}}$ ) :-

Molecular weight, W = 12×2+1×6

• W = 24+6

• W = 30 u

2. Propane ( $C_{\text{3}}H_{\text{8}}$ ) :-

Molecular weight, W = 12×3+1×8

• W = 48+8

• W = 44 u

3. Ethylene ( $C_{\text{2}}H_{\text{4}}$ ) :-

Molecular weight, W = 12×2+1×4

• W = 24+4

• W = 28 u

4. Acetylene ( $C_{\text{2}}H_{\text{2}}$ ) :-

Molecular weight, W = 12×2+1×2

• W = 24+2

• W = 26 u

Hence, compounds in an increasing order of molecular weight are,

Propane > Ethane > Ethylene > Acetylene

$\bold{Hope\;it \; helps\;!}$