CHEM 108 / ICH 192 Past Questions and Answers

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Which of the following organic compounds is commonly used as a solvent in nail polish remover?
A. Ethanol
B. Acetone
C. Benzene
D. Methanol
E. Chloroform
Answer: B
Which of these compounds is most likely to undergo an SN2 reaction?
A. Tertiary alkyl halide
B. Primary alkyl halide
C. Aromatic compound
D. Alkene
E. Ketone
Answer: B
The process of separating a mixture based on the different boiling points of its components is called:
A. Filtration
B. Distillation
C. Recrystallization
D. Chromatography
E. Decantation
Answer: B
Which of the following is NOT a property of acids?
A. They taste sour
B. They turn blue litmus red
C. They feel slippery to touch
D. They react with bases to form salt and water
E. They produce H⁺ ions in water
Answer: C
What type of bond is formed between the oxygen and hydrogen atoms within a water molecule?
A. Ionic bond
B. Hydrogen bond
C. Covalent bond
D. Metallic bond
E. Van der Waals bond
Answer: C
Which of the following processes involves breaking down a compound into simpler substances by heating?
A. Sublimation
B. Electrolysis
C. Thermal decomposition
D. Condensation
E. Precipitation
Answer: C
Which of the following elements has the highest electronegativity?
A. Hydrogen
B. Carbon
C. Fluorine
D. Oxygen
E. Nitrogen
Answer: C
In a chemical reaction, what is the role of a catalyst?
A. To increase the amount of reactants
B. To increase the activation energy
C. To speed up the reaction without being consumed
D. To change the products of the reaction
E. To make the reaction exothermic
Answer: C
Which functional group is present in all amino acids?
A. Hydroxyl group
B. Amine group
C. Carbonyl group
D. Alkyl group
E. Ether group
Answer: B
What is the general formula for an alkene?
A. CnH2n+2
B. CnH2n
C. CnH2n-2
D. CnH2nO
E. CnHn
Answer: B
What is the main function of the mitochondria in a cell?
A. Photosynthesis
B. Protein synthesis
C. Energy production
D. DNA replication
E. Transport of materials
Answer: C
Which of the following elements is found in hemoglobin and helps transport oxygen in the blood?
A. Calcium
B. Iron
C. Magnesium
D. Potassium
E. Sodium
Answer: B
The process by which plants convert carbon dioxide and water into glucose and oxygen using sunlight is called:
A. Respiration
B. Fermentation
C. Photosynthesis
D. Transpiration
E. Glycolysis
Answer: C
Which type of blood vessel carries blood away from the heart?
A. Veins
B. Arteries
C. Capillaries
D. Venules
E. Lymph vessels
Answer: B
What is the chemical symbol for the element gold?
A. G
B. Au
C. Ag
D. Hg
E. Pb
Answer: B
Which of the following molecules is the primary source of energy for cellular processes?
A. DNA
B. ATP
C. RNA
D. NADH
E. Glucose
Answer: B
In which part of the human body is insulin produced?
A. Liver
B. Pancreas
C. Kidneys
D. Spleen
E. Thyroid
Answer: B
The part of the brain responsible for coordinating voluntary movements and maintaining balance is the:
A. Cerebrum
B. Medulla
C. Cerebellum
D. Hypothalamus
E. Thalamus
Answer: C
Which of these is NOT a component of the electromagnetic spectrum?
A. Gamma rays
B. Ultraviolet light
C. Microwaves
D. Sound waves
E. X-rays
Answer: D
The gas used to inflate balloons and make them float is:
A. Hydrogen
B. Helium
C. Nitrogen
D. Oxygen
E. Argon
Answer: B
Which planet in our solar system is known for its extensive ring system?
A. Jupiter
B. Mars
C. Uranus
D. Saturn
E. Neptune
Answer: D
What is the chemical formula for table salt?
A. NaCl
B. KCl
C. NaNO3
D. CaCl2
E. NaOH
Answer: A
The speed of light in a vacuum is approximately:
A. 3,000 kilometers per second
B. 30,000 kilometers per second
C. 300,000 kilometers per second
D. 3 million kilometers per second
E. 30 million kilometers per second
Answer: C
Which type of rock is formed from cooled and solidified magma or lava?
A. Sedimentary
B. Metamorphic
C. Igneous
D. Foliated
E. Chemical
Answer: C
The process of water changing from a liquid to a gas is known as:
A. Precipitation
B. Condensation
C. Evaporation
D. Sublimation
E. Deposition
Answer: C
Which of the following organs is primarily responsible for filtering waste from the blood?
A. Heart
B. Lungs
C. Liver
D. Kidneys
E. Stomach
Answer: D
The powerhouse of the cell is known as:
A. Ribosome
B. Nucleus
C. Endoplasmic reticulum
D. Mitochondrion
E. Lysosome
Answer: D
What is the boiling point of water at sea level?
A. 50°C
B. 75°C
C. 100°C
D. 150°C
E. 200°C
Answer: C
The force that pulls objects toward the center of the Earth is called:
A. Magnetism
B. Gravity
C. Friction
D. Momentum
E. Tension
Answer: B
Which organ system is responsible for transporting blood, nutrients, gases, and wastes through the body?
A. Digestive system
B. Nervous system
C. Circulatory system
D. Endocrine system
E. Respiratory system
Answer: C
What type of organism decomposes dead plants and animals to recycle nutrients into the ecosystem?
A. Herbivores
B. Carnivores
C. Decomposers
D. Omnivores
E. Parasites
Answer: C
Which of these is the most abundant gas in Earth’s atmosphere?
A. Oxygen
B. Nitrogen
C. Carbon dioxide
D. Argon
E. Hydrogen
Answer: B
Which part of the eye regulates the amount of light that enters?
A. Lens
B. Cornea
C. Retina
D. Pupil
E. Iris
Answer: E
The atomic number of an element refers to the number of:
A. Protons
B. Neutrons
C. Electrons
D. Neutrons and electrons combined
E. Protons and neutrons combined
Answer: A
What is the main constituent of natural gas?
A. Ethane
B. Propane
C. Butane
D. Methane
E. Hexane
Answer: D
Which of these energy sources is renewable?
A. Coal
B. Natural gas
C. Wind
D. Oil
E. Nuclear
Answer: C
Which type of electromagnetic radiation has the shortest wavelength?
A. X-rays
B. Microwaves
C. Infrared
D. Ultraviolet
E. Gamma rays
Answer: E
What is the SI unit of electric current?
A. Volt
B. Watt
C. Ohm
D. Ampere
E. Coulomb
Answer: D
In which organelle does photosynthesis occur in plant cells?
A. Mitochondrion
B. Chloroplast
C. Ribosome
D. Nucleus
E. Vacuole
Answer: B
Which of these is an example of a physical change?
A. Rusting of iron
B. Burning of wood
C. Melting of ice
D. Decomposition of water
E. Digestion of food
Answer: C
What is the main type of bond formed between two nonmetals?
A. Ionic
B. Covalent
C. Hydrogen
D. Metallic
E. Van der Waals
Answer: B
The sum of the protons and neutrons in an atom is referred to as its:
A. Atomic number
B. Mass number
C. Isotopic mass
D. Atomic mass unit
E. Electron configuration
Answer: B
Which of these is a scalar quantity?
A. Velocity
B. Force
C. Acceleration
D. Temperature
E. Momentum
Answer: D
Which law states that the volume of a gas is inversely proportional to its pressure at constant temperature?
A. Boyle’s Law
B. Charles’s Law
C. Avogadro’s Law
D. Dalton’s Law
E. Graham’s Law
Answer: A
What is the pH range of a basic solution?
A. 0-1
B. 2-4
C. 5-7
D. 7-14
E. 14-20
Answer: D
The part of the flower responsible for producing pollen is the:
A. Stigma
B. Ovary
C. Anther
D. Petal
E. Sepal
Answer: C
Which of these particles is negatively charged?
A. Proton
B. Neutron
C. Electron
D. Nucleus
E. Photon
Answer: C
The largest planet in our solar system is:
A. Earth
B. Mars
C. Jupiter
D. Neptune
E. Uranus
Answer: C
The primary source of energy for the Earth is:
A. Nuclear reactions within the Earth’s core
B. The Sun
C. Fossil fuels
D. Geothermal heat
E. Tidal forces
Answer: B
What is the chemical formula for ozone?
A. O2
B. O3
C. CO2
D. NO2
E. SO2
Answer: B

CHEM 108 / ICH 192 Past Questions and Answers

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