Sample Questions and Answers
Which of the following is the basic unit of matter?
A) Molecule
B) Atom
C) Electron
D) Proton
Answer: B
What is the charge of a neutron?
A) Positive
B) Negative
C) Neutral
D) None
Answer: C
Which element is commonly used in the formation of organic compounds?
A) Oxygen
B) Carbon
C) Nitrogen
D) Helium
Answer: B
In a covalent bond, atoms share which type of particle?
A) Neutron
B) Electron
C) Proton
D) Photon
Answer: B
What is the pH of a neutral solution?
A) 0
B) 7
C) 14
D) 10
Answer: B
Which of the following is an example of an acid?
A) NaOH
B) HCl
C) NaCl
D) CH3OH
Answer: B
Which of the following is a characteristic of bases?
A) Sour taste
B) Turns red litmus paper blue
C) Produces H+ ions in water
D) None of the above
Answer: B
What is the atomic number of an element?
A) The number of protons
B) The number of electrons
C) The sum of protons and neutrons
D) The number of neutrons
Answer: A
Which of the following compounds is organic?
A) NaCl
B) CH3OH
C) H2O
D) NaOH
Answer: B
Which functional group is present in alcohols?
A) -OH
B) -COOH
C) -NH2
D) -CHO
Answer: A
Which of the following is an example of a strong acid?
A) CH3COOH
B) H2SO4
C) HCl
D) NaOH
Answer: B
What type of bond is formed when two atoms share electrons equally?
A) Polar covalent bond
B) Nonpolar covalent bond
C) Ionic bond
D) Metallic bond
Answer: B
Which of the following is a characteristic of an ionic bond?
A) Atoms share electrons equally
B) Atoms donate or accept electrons
C) The bond involves only nonmetals
D) None of the above
Answer: B
What is the primary role of a buffer in the body?
A) Increase pH levels
B) Prevent large changes in pH
C) Lower pH levels
D) Absorb acids only
Answer: B
Which of the following is a basic organic reaction type?
A) Substitution
B) Precipitation
C) Oxidation
D) Condensation
Answer: A
What is the molecular formula of methane?
A) C2H6
B) CH4
C) C3H8
D) C4H10
Answer: B
Which of the following molecules is a functional group found in carboxylic acids?
A) -OH
B) -COOH
C) -NH2
D) -CHO
Answer: B
Which of the following is an example of an alkene?
A) C2H6
B) C3H8
C) C2H4
D) CH4
Answer: C
Which of the following is NOT a property of acids?
A) They produce H+ ions in solution
B) They have a sour taste
C) They turn blue litmus paper red
D) They accept electrons in a reaction
Answer: D
What is the atomic mass of an element determined by?
A) The number of electrons
B) The number of neutrons
C) The number of protons and neutrons
D) The number of electrons and protons
Answer: C
Which of the following substances is used to neutralize acids in the body?
A) Hydrochloric acid
B) Bicarbonate ions
C) Sodium hydroxide
D) Oxygen
Answer: B
In which of the following reactions is energy released?
A) Endothermic reaction
B) Exothermic reaction
C) Synthesis reaction
D) Decomposition reaction
Answer: B
Which functional group is characteristic of aldehydes?
A) -OH
B) -COOH
C) -CHO
D) -NH2
Answer: C
What is the primary purpose of the laboratory component in this course?
A) To increase theoretical knowledge
B) To apply chemical concepts through hands-on experiments
C) To memorize chemical equations
D) To prepare for exams
Answer: B
Which of the following molecules has a triple bond?
A) Methane
B) Ethylene
C) Acetylene
D) Butane
Answer: C
Which property of water makes it a good solvent for many biological molecules?
A) Its nonpolar nature
B) Its ability to form hydrogen bonds
C) Its high viscosity
D) Its low density
Answer: B
Which of the following is the process of combining small molecules to form a larger one?
A) Hydrolysis
B) Condensation
C) Oxidation
D) Reduction
Answer: B
Which of the following compounds is used to neutralize excess acid in the stomach?
A) NaOH
B) Mg(OH)2
C) HCl
D) H2SO4
Answer: B
Which type of organic compound is characterized by a long hydrocarbon chain and a carboxyl group?
A) Alcohol
B) Carboxylic acid
C) Ketone
D) Ester
Answer: B
Which of the following best describes a chemical reaction in which one molecule loses electrons and another gains electrons?
A) Synthesis reaction
B) Decomposition reaction
C) Redox reaction
D) Precipitation reaction
Answer: C
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