i. Propane, methane, ethene, pentane ii. Methane, butane, benzene, sodium chloride iii. CH4, C2H6, C3H8, CaCO3

Question

Find the odd one out:

i. Propane, methane, ethene, pentane

ii. Methane, butane, benzene, sodium chloride

iii. CH₄, C₂H₆, C₃H₈, CaCO₃

iv. C₂H₂, C₃H₈, C₂H₆, CH₄

v. C₂H₄, C₄H₁₀, C₃H₈, CH₄

Answer 1

i. Ethene. 

(Others are saturated hydrocarbons.)

ii. Sodium chloride. 

(Others are organic compounds.)

iii. CaCO₃. 

(Others are organic compounds.)

iv. C₂H₂. 

(Others are saturated hydrocarbons.)

v. C₂H₄. 

(Others are saturated hydrocarbons.)