Q1) Which technique involves the separation of organic compounds based on their solubility in different solvents?

a) Distillation

b) Chromatography

c) Filtration

d) Crystallization

Q2) Which method is used to remove colored impurities from organic compounds?

a) Recrystallization

b) Distillation

c) Filtration

d) Extraction

Q3) Which solvent is commonly used for recrystallization of organic compounds?

a) Water

b) Benzene

c) Ethanol

d) Acetone

Q4) Which technique separates compounds based on their boiling points?

a) Distillation

b) Chromatography

c) Filtration

d) Extraction

Q5) Which method is suitable for separating a mixture of compounds with different polarities?

a) Distillation

b) Chromatography

c) Filtration

d) Crystallization

Q6) What is the purpose of adding a decolorizing agent during filtration?

a) To remove insoluble impurities

b) To remove colored impurities

c) To increase the yield of the desired compound

d) To speed up the filtration process

Q7) Which technique separates compounds based on their distribution between two immiscible phases?

a) Filtration

b) Distillation

c) Chromatography

d) Extraction

Q8) Which method is used to determine the melting point of an organic compound?

a) Reflux

b) Extraction

c) Chromatography

d) Melting point apparatus

Q9) Which property is primarily used to identify organic compounds using infrared (IR) spectroscopy?

a) Molecular weight

b) Boiling point

c) Functional groups

d) Density

Q10) Which technique involves passing a vaporized sample through a column to separate its components?

a) Distillation

b) Gas chromatography

c) Thin-layer chromatography

d) High-performance liquid chromatography (HPLC)

Q11) Which method is used to measure the purity of a solid organic compound?

a) Melting point determination

b) Distillation

c) Extraction

d) Filtration

Q12) Which technique separates compounds based on their size and shape using a stationary phase and a mobile phase?

a) Distillation

b) Chromatography

c) Extraction

d) Crystallization

Q13) Which technique involves heating a mixture to its boiling point and collecting the condensed vapors?

a) Filtration

b) Distillation

c) Chromatography

d) Recrystallization

Q14) Which spectroscopic technique provides information about the arrangement of atoms within a molecule?

a) UV-Vis spectroscopy

b) Mass spectrometry

c) NMR spectroscopy

d) IR spectroscopy

Q15) Which method is used to separate compounds based on their rate of migration through a stationary phase?

a) Distillation

b) Chromatography

c) Filtration

d) Crystallization

Q16) What is the purpose of performing a TLC (thin-layer chromatography) analysis?

a) To determine the melting point of a compound

b) To separate compounds based on their boiling points

c) To visualize the components of a mixture

d) To measure the pH of a solution

Q17) Which technique involves the use of a solvent to dissolve the desired compound from a solid mixture?

a) Filtration

b) Distillation

c) Extraction

d) Recrystallization

Q18) Which spectroscopic technique provides information about the presence of double bonds in organic compounds?

a) UV-Vis spectroscopy

b) Mass spectrometry

c) NMR spectroscopy

d) IR spectroscopy

Q19) What is the purpose of adding a drying agent during the extraction process?

a) To remove colored impurities

b) To remove water from the organic layer

c) To speed up the extraction process

d) To increase the yield of the desired compound

Q20) Which technique is commonly used to determine the structure and connectivity of atoms in organic compounds?

a) Mass spectrometry

b) IR spectroscopy

c) NMR spectroscopy

d) UV-Vis spectroscopy