Major Competitive Exams

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Q. What is the main type of reaction that haloalkanes undergo? (2020)
  • A. Addition
  • B. Substitution
  • C. Elimination
  • D. Redox
Q. What is the main use of aluminum in construction? (2020)
  • A. Electrical wiring
  • B. Structural components
  • C. Piping
  • D. Insulation
Q. What is the main use of citric acid?
  • A. Preservative
  • B. Flavoring agent
  • C. Cleaning agent
  • D. All of the above
Q. What is the main use of hydrogen in the Haber process?
  • A. To produce ammonia
  • B. To produce water
  • C. To produce hydrogen peroxide
  • D. To produce methane
Q. What is the main use of polycarbonate?
  • A. Insulation
  • B. Optical lenses
  • C. Textiles
  • D. Adhesives
Q. What is the main use of polyvinyl chloride (PVC)?
  • A. Insulation
  • B. Pipes and fittings
  • C. Textiles
  • D. Adhesives
Q. What is the main vector for malaria transmission? (2021)
  • A. Housefly
  • B. Mosquito
  • C. Tick
  • D. Flea
Q. What is the main vector for the transmission of malaria? (2019)
  • A. Housefly
  • B. Mosquito
  • C. Tick
  • D. Flea
Q. What is the major product of the hydration of propene?
  • A. Propan-1-ol
  • B. Propan-2-ol
  • C. Butanol
  • D. Ethylene glycol
Q. What is the major product of the reaction between 1-bromo-2-methylpropane and sodium ethoxide?
  • A. 1-ethoxy-2-methylpropane
  • B. 2-ethoxy-2-methylpropane
  • C. 1-bromo-2-ethoxypropane
  • D. 2-bromo-2-methylpropane
Q. What is the major product of the reaction between 1-bromobutane and sodium ethoxide in ethanol?
  • A. 1-ethoxybutane
  • B. 2-ethoxybutane
  • C. butane
  • D. no reaction
Q. What is the major product of the reaction between 1-bromobutane and sodium hydroxide in ethanol?
  • A. 1-butanol
  • B. 2-butanol
  • C. butyl bromide
  • D. butyl ether
Q. What is the major product of the reaction between chlorobenzene and sodium hydroxide at high temperature?
  • A. Phenol
  • B. Benzene
  • C. Chlorobenzene
  • D. Sodium phenoxide
Q. What is the major product of the reaction of 1-bromobutane with sodium ethoxide in ethanol?
  • A. 1-butene
  • B. 2-butene
  • C. butane
  • D. no reaction
Q. What is the major product of the reaction of 1-bromobutane with sodium ethoxide?
  • A. Butane
  • B. Ethyl butyl ether
  • C. 1-butene
  • D. 2-butene
Q. What is the major product of the reaction of 1-bromobutane with sodium hydroxide in ethanol? (2019)
  • A. Butanol
  • B. Butene
  • C. Butyl bromide
  • D. Sodium bromide
Q. What is the major product of the reaction of 1-butene with HBr?
  • A. 1-bromobutane
  • B. 2-bromobutane
  • C. Butane
  • D. Bromobenzene
Q. What is the major product of the reaction of 2-butyne with H2 in the presence of a catalyst?
  • A. 1-butyne
  • B. butane
  • C. 2-butyne
  • D. 3-butyne
Q. What is the major product of the reaction of propene with HBr?
  • A. 1-Bromopropane
  • B. 2-Bromopropane
  • C. Propyl bromide
  • D. Bromopropene
Q. What is the major product when 1-bromobutane reacts with sodium ethoxide in ethanol?
  • A. 1-ethoxybutane
  • B. 2-ethoxybutane
  • C. butane
  • D. butyl ethyl ether
Q. What is the major product when 1-bromobutane reacts with sodium ethoxide? (2021)
  • A. Butane
  • B. Ethyl butyl ether
  • C. 1-butanol
  • D. 2-butanol
Q. What is the major product when 2-bromobutane is treated with KOH in ethanol?
  • A. But-1-ene
  • B. But-2-ene
  • C. Butane
  • D. No reaction
Q. What is the major product when propene is treated with bromine?
  • A. 1-bromopropane
  • B. 2-bromopropane
  • C. Bromopropane
  • D. No reaction
Q. What is the major product when propene reacts with HBr?
  • A. 1-Bromopropane
  • B. 2-Bromopropane
  • C. Propyl bromide
  • D. Bromopropene
Q. What is the majority charge carrier in a P-type semiconductor?
  • A. Electrons
  • B. Holes
  • C. Neutrons
  • D. Protons
Q. What is the male gamete in flowering plants called? (2020)
  • A. Ovule
  • B. Pollen
  • C. Style
  • D. Stigma
Q. What is the male reproductive part of a flower called? (2020)
  • A. Stigma
  • B. Anther
  • C. Ovary
  • D. Style
Q. What is the mass defect in a nucleus?
  • A. The difference between the mass of the nucleus and the sum of the masses of its nucleons
  • B. The mass of the nucleus itself
  • C. The mass of the electrons surrounding the nucleus
  • D. The mass of the binding energy
Q. What is the mass defect of a nucleus? (2019)
  • A. The difference between the mass of the nucleus and the sum of the masses of its individual nucleons
  • B. The mass of the nucleus itself
  • C. The mass of the electrons surrounding the nucleus
  • D. The mass of the nucleus in a different state
Q. What is the mass of 0.25 moles of glucose (C6H12O6)? (Molar mass = 180 g/mol)
  • A. 45 g
  • B. 90 g
  • C. 60 g
  • D. 75 g
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