Which of the following class of organic compound does not contain (C = O) group in some form ?

(1) Aldehydes
(2) Ethers
(3) Carboxylic acids
(4) Esters

Which of the following substance is used for unsaturation test of hydrocarbons

(1) Br₂  solution 
(2) Baeyer's reagent 
(3) Ethylene glycol 
(4) A and B both

Which of the following hydrocarbons have acidic hydrogen?
(1) CH₂=CH₂
(2)
(3) CH₄
(4) C₆H₆

The number of carbon atom in kerosene oil is

(1) C₆– C₁₁
(2) C₂₀ – C₃₀
(3) C₁₁ – C₁₆
(4) C₁₈ – C₂₂ 

The action of cleaning of oily dirt by soap is based on .......

(1) solubility in water
(2) hydrophilic property
(3) hydrophobic property
(4) presence of both hydrophilic and hydrophobic groups