3 Which compound gives effervescence with sodium bicarbonate? A Alcohol B Aldehyde C Carboxylic acid D Ester
4 The process of ester formation is called: A Hydrogenation B Esterification C Saponification D Neutralization
7 Reaction involving H-atom of carboxylic acid shows its: A Basic nature B Acidic nature C Neutral nature D Oxidizing nature
10 Which product is common in reactions of carboxylic acids with bases? A Hydrogen B Salt C Ester D Carbon dioxide
13 Which group of carboxylic acid takes part in ester formation? A Carbonyl group B Alkyl group C –OH group D –COO– group
14 Which reaction confirms acidic nature of carboxylic acids? A Reaction with alcohol B Reaction with ester C Reaction with sodium bicarbonate D Reaction with aldehyde
15 Why are carboxylic acids acidic in nature? A Due to presence of –OH group only B Due to release of H+ from –COOH group C Due to presence of carbonyl group D Due to high molecular mass
17 Which salt is formed when ethanoic acid reacts with sodium metal? A Sodium acetate B Sodium carbonate C Sodium bicarbonate D Sodium hydroxide
18 Which property makes esters suitable for perfumes? A High acidity B Pleasant smell C High reactivity D Strong basicity
19 Which ester is used as solvent in paints? A Ethyl ethanoate B Sodium ethanoate C Methanoic acid D Ethanoic acid
20 Which bacteria are responsible for conversion of ethanol into vinegar? A Lactobacillus B Acetobacter C Rhizobium D E. coli