4 Alcohols help cosmetics by: A Increasing hardness B Improving fragrance spreading C Reducing color D Causing rust
5 Alkenes generally have boiling points: A Higher than alkanes of same mass B Lower than alkanes of same mass C Equal to alkynes D Very high
6 Which benefit of ethanol makes it important in medicine? A High sweetness B Antiseptic nature C High toxicity D Strong acidity
7 Which property makes esters suitable for perfumes? A High acidity B Pleasant smell C High reactivity D Strong basicity
8 Hydration of ethene is an example of: A Substitution reaction B Addition reaction C Elimination reaction D Oxidation reaction
14 Which bacteria are responsible for conversion of ethanol into vinegar? A Lactobacillus B Acetobacter C Rhizobium D E. coli
15 Which gas is released when carboxylic acid reacts with bicarbonate? A Hydrogen B Oxygen C Carbon dioxide D Nitrogen
16 Which petroleum fraction is used as lubricating oil? A Kerosene B Diesel C Heavy oil fraction D Refinery gas
17 Which test is used to detect unsaturation in hydrocarbons? A Litmus test B Bromine water test C Flame test D Solubility test
18 Alcohols are used in cosmetics mainly as: A Coloring agents B Solvents and preservatives C Sweeteners D Fertilizers
19 The reaction of carboxylic acids with bases is called: A Esterification B Neutralization C Oxidation D Reduction
23 Which factor increases alcohol-related health risks? A Moderate use B Excessive use C Occasional use D Medical use
24 Which reaction represents combustion of ethanol? A C2H5OH → C2H4 + H2O B C2H5OH + O2 → CO2 + H2O C C2H5OH → CH3COOH D C2H5OH + HCl → C2H5Cl