#1
What is the purpose of a Soxhlet extractor in organic chemistry?
Distillation
Extraction
Filtration
Crystallization
#2
What is the purpose of a Buchner funnel in organic chemistry?
Distillation
Filtration
Crystallization
Extraction
#3
Which method is commonly used for the determination of the melting point of a solid in organic chemistry?
Gas Chromatography
NMR Spectroscopy
Melting Point Apparatus
UV-Visible Spectroscopy
#4
What is the primary purpose of a desiccator in the laboratory?
Distillation
Crystallization
Drying and storing moisture-sensitive samples
Extraction
#5
In the context of organic synthesis, what does the term 'yield' refer to?
The amount of product obtained in a reaction
The speed of a chemical reaction
The concentration of a solution
The energy released in a reaction
#6
Which technique is used to separate components of a mixture based on their solubility in different solvents?
Chromatography
Distillation
Crystallization
Filtration
#7
What is the purpose of a Dean-Stark apparatus in organic chemistry?
Extraction
Crystallization
Distillation
Filtration
#8
Which spectroscopic technique is used to determine the structure of organic compounds by measuring the absorption of infrared radiation?
NMR Spectroscopy
Mass Spectrometry
Infrared Spectroscopy
UV-Visible Spectroscopy
#9
Which method is commonly used to separate and purify proteins based on their charge and size?
HPLC (High-Performance Liquid Chromatography)
Gel Electrophoresis
Gas Chromatography
Thin-Layer Chromatography (TLC)
#10
What is the primary purpose of a reflux setup in organic chemistry?
Distillation
Crystallization
Extraction
Maintaining constant temperature during reactions
#11
In NMR spectroscopy, what does the chemical shift indicate?
Concentration of the sample
Number of protons
Magnetic field strength
Chemical environment of nuclei
#12
Which reagent is commonly used for the reduction of ketones to alcohols?
LiAlH4 (Lithium Aluminum Hydride)
NaBH4 (Sodium Borohydride)
H2SO4 (Sulfuric Acid)
KMnO4 (Potassium Permanganate)
#13
In organic synthesis, what does the term 'protecting group' refer to?
A reagent used in reactions
A group added to protect a reactive site
A catalyst in chemical reactions
A solvent used in extractions
#14
In column chromatography, what is the stationary phase typically composed of?
Silica gel
Water
Hexane
Methanol
#15
What is the purpose of a rotary evaporator in organic chemistry?
Distillation
Extraction
Filtration
Crystallization