Q.1: What is the simplest alkane?
A) Ethane
B) Propane
C) Methane
D) Butane
Q.2: What is the molecular formula of methane?
A) C2H6
B) C3H8
C) C4H10
D) CH4
Q.3: Alkanes are also known as what?
A) Acetylenes
B) Paraffins
C) Alkenes
D) Aromatics
Q.4: What type of bonds do alkanes have?
A) Double bonds
B) Triple bonds
C) Single bonds
D) Quadruple bonds
Q.5: Which alkane is a gas at room temperature?
A) Pentane
B) Hexane
C) Butane
D) Octane
Q.6: Which alkanes are liquid at room temperature?
A) C1 to C4
B) C5 to C10
C) C11 to C15
D) C16 and above
Q.7: Alkanes are soluble in which type of solvents?
A) Water
B) Organic solvents
C) Both A and B
D) None of the above
Q.8: What happens to the boiling points of alkanes as molecular size increases?
A) They decrease
B) They remain the same
C) They increase
D) They fluctuate
Q.9: What is a characteristic property of alkanes?
A) Reactivity with metals
B) Substitution reactions with halogens
C) Formation of double bonds
D) None of the above
Q.10: What type of reaction occurs when alkanes burn in excess oxygen?
A) Incomplete combustion
B) Complete combustion
C) Substitution reaction
D) Addition reaction
Q.11: What is produced during the complete combustion of alkanes?
A) Carbon monoxide
B) Carbon dioxide and water
C) Methane
D) Hydrogen gas
Q.12: Which gas is primarily used as a domestic fuel?
A) Ethane
B) Methane
C) Propane
D) Butane
Q.13: What is the effect of high temperature on alkanes?
A) They become solids
B) They become liquids
C) They react with halogens
D) They lose their odor
Q.14: How is acetylene formed?
A) By heating alkyl halides
B) By hydrogenation of alkanes
C) By combustion of methane
D) By adding water to alkanes
Q.15: Which process is used to prepare alkanes from alkyl halides?
A) Reduction
B) Oxidation
C) Substitution
D) Hydrolysis
Q.16: In what form do the first four members of the alkane series exist?
A) Solids
B) Liquids
C) Gases
D) Vapors
Q.17: Which reaction involves the addition of hydrogen to unsaturated hydrocarbons?
A) Hydrogenation
B) Halogenation
C) Oxidation
D) Reduction
Q.18: Which catalyst can be used in the hydrogenation of alkenes and alkynes?
A) Iron
B) Zinc
C) Nickel
D) Copper
Q.19: What is formed when methane reacts with chlorine in the presence of sunlight?
A) Ethane
B) Chloromethane
C) Dichloromethane
D) Acetylene
Q.20: What is a byproduct of incomplete combustion of alkanes?
A) Water
B) Carbon monoxide
C) Hydrogen gas
D) Carbon dioxide
Q.21: Which gas makes up about 85% of natural gas?
A) Ethane
B) Propane
C) Methane
D) Butane
Q.22: What is the result of the reaction of alkanes with halogens in diffused sunlight?
A) No reaction
B) Explosive reaction
C) Substitution reaction
D) Addition reaction
Q.23: What is the main source of alkanes?
A) Air
B) Water
C) Petroleum and natural gas
D) Coal
Q.24: What do you call the decay of vegetable matter that produces methane?
A) Anaerobic digestion
B) Bacterial decay
C) Fermentation
D) Distillation
Q.25: Which alkane is used in the manufacture of chemicals like carbon black and alcohols?
A) Ethane
B) Propane
C) Methane
D) Butane
Q.26: What happens to the density of alkanes as molecular size increases?
A) It decreases
B) It increases
C) It remains the same
D) It fluctuates
Q.27: What is the result of halogenation in alkanes?
A) Formation of double bonds
B) Substitution of hydrogen atoms
C) Addition of hydrogen
D) Elimination of halogens
Q.28: How do alkanes become less flammable?
A) With decreasing molecular size
B) With increasing molecular size
C) With heat
D) With cold
Q.29: Which of the following statements is true about alkanes?
A) They are highly reactive
B) They are saturated hydrocarbons
C) They are polar compounds
D) They have triple bonds
Q.30: What type of reaction occurs during combustion of alkanes in limited oxygen?
A) Complete combustion
B) Incomplete combustion
C) Substitution reaction
D) Hydrolysis