Major Competitive Exams

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Q. What is the main product when ethylamine is treated with nitrous acid?
  • A. Ethyl alcohol
  • B. Ethyl diazonium salt
  • C. Ethylamine hydrochloride
  • D. No reaction
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 hydrogen reacts with oxygen? (2019)
  • A. Water
  • B. Hydrogen peroxide
  • C. Ozone
  • D. Hydroxide
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 bromine?
  • A. Bromobenzene
  • B. Bromophenol
  • C. Benzene
  • D. Bromobutane
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 bromine? (2019)
  • A. Bromobenzene
  • B. Bromophenol
  • C. Benzene
  • D. No reaction
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 phenol reacts with sodium hydroxide?
  • A. Sodium phenoxide
  • B. Sodium benzoate
  • C. Benzene
  • D. Phenyl acetate
Q. What is the main product when propan-2-one is treated with iodine in the presence of a base?
  • A. Iodoform
  • B. Acetone
  • C. Bromoform
  • D. Chloroform
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 propan-2-one is treated with sodium borohydride? (2023)
  • A. Propan-1-ol
  • B. Propan-2-ol
  • C. Propan-3-ol
  • D. No reaction
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 propanal is treated with sodium bisulfite? (2019)
  • A. Sodium propanoate
  • B. Propyl sulfonate
  • C. Propane-1,2-diol
  • D. A bisulfite adduct
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 a choke in an AC circuit? (2022)
  • A. To increase current
  • B. To decrease current
  • C. To store energy
  • D. To convert AC to DC
Q. What is the main purpose of a motherboard?
  • A. Store data
  • B. Connect all components
  • C. Power the computer
  • D. Input data
Q. What is the main purpose of a Punnett square? (2020)
  • A. To determine the phenotype
  • B. To predict genetic variation
  • C. To identify alleles
  • D. To analyze pedigrees
Q. What is the main purpose of amniotic fluid? (2022)
  • A. Protection of the fetus
  • B. Nourishment of the fetus
  • C. Gas exchange
  • D. Hormonal regulation
Q. What is the main purpose of an operating system's kernel? (2023)
  • A. To provide a user interface
  • B. To manage system resources
  • C. To run applications
  • D. To connect to the internet
Q. What is the main purpose of classification in biology? (2019)
  • A. To identify organisms
  • B. To understand evolutionary relationships
  • C. To simplify the study of organisms
  • D. All of the above
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 family planning? (2021)
  • A. To increase population growth
  • B. To allow couples to decide the number and spacing of children
  • C. To promote early childbirth
  • D. To discourage contraceptive use
Q. What is the main purpose of reading comprehension strategies?
  • A. To memorize information
  • B. To improve reading speed
  • C. To enhance understanding of the text
  • D. To increase vocabulary
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