1. Which test is used to identify aliphatic primary amines?
a) Tollen’s test
b) Fehling’s test
c) Isocyanide test
d) Azo dye test
Answer: c
2. Hydrolysis of aluminium carbide (Al₄C₃) produces:
a) CH₄
b) C₂H₆
c) C₂H₄
d) C₂H₂
Answer: a
3. Which pair of compounds is commonly used as anaesthetics?
a) Nitrous oxide and chloroform
b) Chloroform and nitrogen dioxide
c) Nitrogen dioxide and ether
d) Ether and ammonia
Answer: a
4. The cleaning action of soaps and detergents in water is due to the formation of:
a) Micelles
b) Salts
c) Bases
d) Acids
Answer: a
5. Alkenes were previously known as:
a) Paraffins
b) Titoffins
c) Olefins
d) Meloffins
Answer: c
6. The alcohol obtained during saponification is:
a) Ethanol
b) Methanol
c) Wood spirit
d) Glycerol
Answer: d
7. How many hydrogen atoms are present in decane (C₁₀H₂₂)?
a) 22
b) 33
c) 11
d) 44
Answer: a
8. Which compound is always formed during sugar fermentation?
a) Methanol
b) Ethanol
c) Acetic acid
d) Ethylene
Answer: b
9. Aromatic hydrocarbons contain at least how many benzene rings?
a) Four
b) Three
c) Two
d) One
Answer: d
10. After fermentation, the major commercial use of molasses is to produce:
a) Methanol
b) Sugar
c) Ethanol
d) Sugarcane juice
Answer: c
11. What prevents fuel from freezing in space crafts?
a) Benzene
b) Glycol
c) Acetylene
d) Esters
Answer: b
12. What is Baeyer’s reagent?
a) Bromine water
b) Acidic potassium permanganate
c) Hydrogen peroxide
d) Alkaline potassium permanganate
Answer: d
13. Which compound turns into phosgene upon exposure to sunlight?
a) Chloroform
b) Acetone
c) Benzene
d) Propylene
Answer: a
14. The chemical name of gamma-hexane is:
a) Toluene
b) Chlorobenzene
c) Aniline
d) Benzene hexachloride
Answer: d
15. Wood spirit is another name for:
a) Methyl alcohol
b) Ethyl alcohol
c) Butyl alcohol
d) Propyl alcohol
Answer: a
16. Alcohol production from organic substances by microbes is called:
a) Anaerobic respiration
b) Aerobic respiration
c) Combustion
d) Fermentation
Answer: d
17. The conversion of sugar to alcohol is known as:
a) Fermentation
b) Respiration
c) Photosynthesis
d) Excretion
Answer: a
18. The gas responsible for explosions in coal mines is:
a) Hydrogen
b) Carbon monoxide
c) Air
d) Methane
Answer: d
19. The primary source of naphthalene is:
a) Coal tar
b) Diesel
c) Charcoal
d) Camphor
Answer: a
20. An isomer of ethyl alcohol is:
a) Dimethyl ether
b) Diethyl ether
c) Acetone
d) Methyl ethyl ether
Answer: a
21. Ethanol containing 5% water is called:
a) Rectified spirit
b) Absolute alcohol
c) Dilute alcohol
d) Power alcohol
Answer: a