Chemistry 101 | Questions with 100% Verified Answers | Latest
Update 2026/2027
Question: Which of the following represents a hypothesis?
A) Sodium reacts with water to form sodium hydroxide and
hydrogen gas. B) Nitrogen gas is a fairly inert substance.
C) Nickel has a silvery sheen.
D) When a substance combusts, it combines with air.
E) When wood burns, heat is given off.
Answer:
Answer: D
Question: Dalton's Atomic Theory states
A) that all elements have several isotopes.
B) that matter is composed of small indestructible particles.
C) that the properties of matter are determined by the
properties of atoms. D) that energy is neither created nor
destroyed during a chemical reaction. E) that an atom is
predominantly empty space.
Answer:
Answer: B
Question: 7) Which of the following statements is TRUE?
A) A scientific law is fact.
B) Once a theory is constructed, it is considered fact.
C) A hypothesis is speculation that is difficult to test.
D) An observation explains why nature does something.
E) A scientific law summarizes a series of related observations.
Answer:
Answer: E
Question: 13) Decanting is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the
solid from the liquid. E) heating a mixture of two solids to fuse
them together.
Answer: C
Answer:
, Question: 14) Distillation is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the
solid from the liquid. E) heating a mixture of two solids to fuse
them together.
Answer: A
Answer:
Question: 15) Filtration is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the
solid from the liquid. E) heating a mixture of two solids to fuse
them together.
Answer: D
Answer:
Question: 16) Two or more substances in variable proportions, where the
composition is variable throughout are
A) a solution.
B) a homogeneous mixture. C) a compound.
Answer: E
D) an amorphous solid.
E) a heterogeneous mixture.
Answer:
Question: 18) A chemical change
A) occurs when methane gas is burned.
B) occurs when paper is shredded.
C) occurs when water is vaporized.
D) occurs when salt is dissolved in water.
E) occurs when powdered lemonade is stirred into water.
Answer: A
Answer:
Update 2026/2027
Question: Which of the following represents a hypothesis?
A) Sodium reacts with water to form sodium hydroxide and
hydrogen gas. B) Nitrogen gas is a fairly inert substance.
C) Nickel has a silvery sheen.
D) When a substance combusts, it combines with air.
E) When wood burns, heat is given off.
Answer:
Answer: D
Question: Dalton's Atomic Theory states
A) that all elements have several isotopes.
B) that matter is composed of small indestructible particles.
C) that the properties of matter are determined by the
properties of atoms. D) that energy is neither created nor
destroyed during a chemical reaction. E) that an atom is
predominantly empty space.
Answer:
Answer: B
Question: 7) Which of the following statements is TRUE?
A) A scientific law is fact.
B) Once a theory is constructed, it is considered fact.
C) A hypothesis is speculation that is difficult to test.
D) An observation explains why nature does something.
E) A scientific law summarizes a series of related observations.
Answer:
Answer: E
Question: 13) Decanting is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the
solid from the liquid. E) heating a mixture of two solids to fuse
them together.
Answer: C
Answer:
, Question: 14) Distillation is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the
solid from the liquid. E) heating a mixture of two solids to fuse
them together.
Answer: A
Answer:
Question: 15) Filtration is
A) a process in which the more volatile liquid is boiled off.
B) dissolving a solid into a liquid.
C) separating a solid from a liquid by pouring off the liquid.
D) pouring a mixture through a filter paper to separate the
solid from the liquid. E) heating a mixture of two solids to fuse
them together.
Answer: D
Answer:
Question: 16) Two or more substances in variable proportions, where the
composition is variable throughout are
A) a solution.
B) a homogeneous mixture. C) a compound.
Answer: E
D) an amorphous solid.
E) a heterogeneous mixture.
Answer:
Question: 18) A chemical change
A) occurs when methane gas is burned.
B) occurs when paper is shredded.
C) occurs when water is vaporized.
D) occurs when salt is dissolved in water.
E) occurs when powdered lemonade is stirred into water.
Answer: A
Answer:
