Chemistry (School & UG)

Q. What is the main functional group in alkenes?
  • A. Alcohol
  • B. Aldehyde
  • C. Alkene
  • D. Alkyne
Q. What is the main functional group present in acetic acid?
  • A. Alcohol
  • B. Aldehyde
  • C. Carboxylic acid
  • D. Ketone
Q. What is the main functional group present in alkenes?
  • A. Alcohol
  • B. Aldehyde
  • C. Alkene
  • D. Alkyne
Q. What is the main functional group present in amines?
  • A. Hydroxyl group
  • B. Carboxyl group
  • C. Amino group
  • D. Carbonyl group
Q. What is the main mechanism for the reaction of 1-bromobutane with sodium hydroxide in ethanol?
  • A. SN1
  • B. SN2
  • C. E1
  • D. E2
Q. What is the main mechanism for the reaction of 1-bromopropane with sodium hydroxide in ethanol?
  • A. SN1
  • B. SN2
  • C. E1
  • D. E2
Q. What is the main mechanism for the reaction of 2-bromobutane with sodium hydroxide in ethanol?
  • A. SN1
  • B. SN2
  • C. E1
  • D. E2
Q. What is the main mechanism of the reaction between 1-bromopropane and sodium hydroxide in ethanol?
  • A. SN1
  • B. SN2
  • C. E1
  • D. E2
Q. What is the main mechanism of the reaction between an alkyl halide and a nucleophile in a bimolecular nucleophilic substitution (SN2) reaction?
  • A. Formation of a carbocation
  • B. Direct attack of the nucleophile
  • C. Formation of a cyclic intermediate
  • D. Elimination of a leaving group
Q. What is the main principle behind the use of UV-Vis spectroscopy in qualitative analysis?
  • A. It measures the mass of a sample
  • B. It detects the presence of specific ions based on their absorbance
  • C. It separates components based on their charge
  • D. It identifies compounds based on their melting points
Q. What is the main product of the dehydration of 2-butanol?
  • A. Butene
  • B. Butyne
  • C. Butanol
  • D. Butanal
Q. What is the main product of the reaction between propene and bromine?
  • A. 1-bromopropane
  • B. 2-bromopropane
  • C. 1,2-dibromopropane
  • D. Bromopropane
Q. What is the main product when an amine reacts with a carboxylic acid?
  • A. Amide
  • B. Ester
  • C. Alcohol
  • D. Aldehyde
Q. What is the main product when hydrogen reacts with chlorine gas?
  • A. Hydrochloric acid
  • B. Hydrogen chloride
  • C. Chlorine gas
  • D. Chlorinated hydrocarbons
Q. What is the main product when hydrogen reacts with halogens?
  • A. Hydrides
  • B. Acids
  • C. Salts
  • D. Oxides
Q. What is the main purpose of calcination in metallurgy?
  • A. To remove moisture
  • B. To convert carbonates to oxides
  • C. To reduce metal ores
  • D. To purify metals
Q. What is the main purpose of roasting in metallurgy?
  • A. To purify metals
  • B. To convert sulfides to oxides
  • C. To increase solubility
  • D. To reduce metal ores
Q. What is the main purpose of using a buffer in electrophoresis?
  • A. To increase the temperature
  • B. To maintain a constant pH
  • C. To enhance the conductivity
  • D. To reduce sample size
Q. What is the main purpose of using a buffer solution in titration?
  • A. To increase the solubility of the titrant
  • B. To maintain a constant pH during the reaction
  • C. To enhance the color change of the indicator
  • D. To reduce the volume of the solution
Q. What is the main purpose of using a flux in metallurgy?
  • A. To increase the melting point
  • B. To facilitate the reduction of ores
  • C. To remove impurities
  • D. To enhance the color of metals
Q. What is the main purpose of using carbon in the extraction of metals from their ores?
  • A. To increase melting point
  • B. To act as a reducing agent
  • C. To form alloys
  • D. To enhance conductivity
Q. What is the main purpose of using carbon in the extraction of metals from their oxides?
  • A. To increase temperature
  • B. To act as a catalyst
  • C. To reduce metal oxides
  • D. To form alloys
Q. What is the main purpose of using carbon in the reduction of metal oxides?
  • A. To increase temperature
  • B. To act as a catalyst
  • C. To provide electrons
  • D. To form alloys
Q. What is the main reason for the difference in boiling points between cis and trans isomers?
  • A. Molecular weight
  • B. Dipole moment
  • C. Hydrogen bonding
  • D. Steric hindrance
Q. What is the main reason for the low boiling point of hydrogen compared to other group 1 hydrides?
  • A. Hydrogen forms stronger bonds
  • B. Hydrogen has a lower molecular weight
  • C. Hydrogen does not form hydrogen bonds
  • D. Hydrogen is a gas at room temperature
Q. What is the main use of alkenes in the industry?
  • A. Fuel
  • B. Plastics production
  • C. Solvents
  • D. Detergents
Q. What is the major product of the addition of HBr to 2-pentene?
  • A. 1-bromopentane
  • B. 2-bromopentane
  • C. 3-bromopentane
  • D. No reaction
Q. What is the major product of the dehydration of 2-butanol?
  • A. Butene
  • B. Butyne
  • C. Butanol
  • D. Butanal
Q. What is the major product of the electrophilic substitution of benzene with bromine in the presence of FeBr3?
  • A. Bromobenzene
  • B. Benzyl bromide
  • C. Bromobenzyl
  • D. Benzene
Q. What is the major product of the electrophilic substitution of toluene with bromine in the presence of FeBr3?
  • A. Bromotoluene
  • B. Bromobenzene
  • C. Benzyl bromide
  • D. No reaction
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