Q. What is the main product when hydrogen reacts with nitrogen at high temperatures?
  • A. Ammonia
  • B. Hydrazine
  • C. Nitric oxide
  • D. Nitrogen gas
Q. What is the main product when phenol is treated with bromine water?
  • A. Bromobenzene
  • B. 2,4,6-Tribromophenol
  • C. Bromophenol
  • D. Benzene
Q. What is the main product when phenol is treated with zinc dust?
  • A. Benzene
  • B. Cyclohexanol
  • C. Toluene
  • D. Phenyl ether
Q. What is the main product when phenol reacts with bromine water?
  • A. Bromobenzene
  • B. 2,4,6-tribromophenol
  • C. Bromophenol
  • D. Benzene
Q. What is the main product when phenol reacts with concentrated sulfuric acid?
  • A. Phenyl sulfate
  • B. Benzene
  • C. Catechol
  • D. Anisole
Q. What is the main product when propan-2-one is treated with sodium bisulfite?
  • A. Sodium propan-2-one sulfonate
  • B. Propan-2-ol
  • C. Propan-2-one bisulfite adduct
  • D. None of the above
Q. What is the main product when propanal is treated with excess alcohol in the presence of an acid catalyst?
  • A. Aldol
  • B. Acetal
  • C. Ketone
  • D. Carboxylic acid
Q. What is the main product when propanal is treated with excess Grignard reagent followed by hydrolysis?
  • A. Propan-1-ol
  • B. Propan-2-ol
  • C. Propan-1,2-diol
  • D. Butan-2-ol
Q. What is the main product when propanal is treated with excess hydrogen in the presence of a catalyst?
  • A. Propan-1-ol
  • B. Propan-2-ol
  • C. Propanoic acid
  • D. Propane
Q. What is the main product when propanoic acid is treated with thionyl chloride?
  • A. Propyl chloride
  • B. Propanoic anhydride
  • C. Propionyl chloride
  • D. Propylene
Q. What is the main product when propene is reacted with hydrogen in the presence of a catalyst?
  • A. Propane
  • B. Butane
  • C. Ethane
  • D. Cyclopropane
Q. What is the main product when propene undergoes hydroboration-oxidation?
  • A. Propan-1-ol
  • B. Propan-2-ol
  • C. Propanoic acid
  • D. Butanol
Q. What is the main product when toluene is nitrated?
  • A. Nitrotoluene
  • B. Dinitrotoluene
  • C. Benzaldehyde
  • D. Benzyl alcohol
Q. What is the main purpose of emulsifiers in food products?
  • A. Thicken
  • B. Stabilize mixtures
  • C. Add flavor
  • D. Preserve freshness
Q. What is the main purpose of using antioxidants in food?
  • A. Enhance color
  • B. Prevent oxidation
  • C. Improve taste
  • D. Increase shelf life
Q. What is the main purpose of using baking soda in cooking?
  • A. Flavoring
  • B. Leavening
  • C. Preserving
  • D. Coloring
Q. What is the main purpose of using fluoride in dental care?
  • A. Whiten teeth
  • B. Prevent cavities
  • C. Freshen breath
  • D. Strengthen gums
Q. What is the main reaction type when alcohols are converted to alkyl halides?
  • A. Substitution
  • B. Elimination
  • C. Addition
  • D. Redox
Q. What is the main reason for the appearance of a diffraction pattern when light passes through a narrow slit?
  • A. Interference of light waves
  • B. Refraction of light
  • C. Absorption of light
  • D. Reflection of light
Q. What is the main reason for the existence of geometric isomers?
  • A. Presence of double bonds
  • B. Presence of single bonds
  • C. Presence of chiral centers
  • D. Presence of functional groups
Q. What is the main reason for the stability of aromatic compounds?
  • A. High molecular weight
  • B. Presence of double bonds
  • C. Resonance energy
  • D. Hydrogen bonding
Q. What is the main reason for the stability of atomic nuclei?
  • A. Electromagnetic force
  • B. Gravitational force
  • C. Strong nuclear force
  • D. Weak nuclear force
Q. What is the main reason for the stability of benzene?
  • A. Presence of double bonds
  • B. Resonance
  • C. Hydrogen bonding
  • D. Ionic interactions
Q. What is the main reason for the stability of the electron orbits in an atom?
  • A. Centripetal force
  • B. Electrostatic force
  • C. Quantum mechanics
  • D. All of the above
Q. What is the main reason for the stability of the nucleus in an atom?
  • A. Electromagnetic force
  • B. Gravitational force
  • C. Strong nuclear force
  • D. Weak nuclear force
Q. What is the main reason for the stability of the nucleus?
  • A. Electromagnetic force
  • B. Gravitational force
  • C. Strong nuclear force
  • D. Weak nuclear force
Q. What is the main reason that gases have low density compared to solids and liquids?
  • A. High temperature
  • B. Low pressure
  • C. Large particle separation
  • D. High kinetic energy
Q. What is the main source of alkanes?
  • A. Coal
  • B. Natural gas
  • C. Petroleum
  • D. Biomass
Q. What is the main source of nitrogen oxides in the atmosphere?
  • A. Volcanic eruptions
  • B. Vehicle emissions
  • C. Industrial processes
  • D. Agricultural activities
Q. What is the main source of sulfur dioxide in the atmosphere?
  • A. Volcanic eruptions
  • B. Automobile emissions
  • C. Industrial processes
  • D. All of the above
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