General Chemistry: Module 1
Overview With Detailed Questions And
Correct Answers||Latest Exam 2026-
2027||Already Graded A+
What are the three states of matter? -ANSWER Solid, Liquid, Gas.
What does the Law of Multiple Proportions state? -ANSWER When two elements form
more than one compound, the masses of one element that combine with a fixed mass
of the other can be expressed in small whole number ratios.
Provide an example of the Law of Multiple Proportions. -ANSWER CO (28g/mole) and
CO2 (44g/mole).
What is the fourth state of matter? -ANSWER Plasma, which is the most abundant state
of matter.
What is the significance of the Law of Conservation of Mass? -ANSWER Mass/matter is
always constant; it cannot be created or destroyed.
Who proposed the atomic theory that matter is made up of indivisible atoms? -ANSWER
Democritus.
What was John Dalton's contribution to atomic theory? -ANSWER He proposed that
elements are composed of indivisible atoms and that atoms of different elements differ
in size, mass, and other properties.
What model did J.J. Thompson propose for the atom? -ANSWER The Plum Pudding
model, which depicts electrons embedded in a positively charged framework.
What did Ernest Rutherford discover? -ANSWER The proton and that the atom is mostly
empty space with positive particles concentrated in the nucleus.
What is the atomic model proposed by Neil Bohr? -ANSWER The Planetary model,
which describes electrons orbiting the nucleus in defined paths.
What does Erwin Schrodinger's quantum model estimate? -ANSWER The probability of
finding an electron in certain positions, represented as an electron cloud or orbital.
What is a pure substance? -ANSWER A material with a uniform and definite
composition, which can be an element or a compound.
, What is the difference between a homogeneous mixture and a heterogeneous mixture?
-ANSWER A homogeneous mixture has a uniform composition (e.g., solution), while a
heterogeneous mixture has distinct phases (e.g., suspension, colloid).
What are intrinsic properties of matter? -ANSWER Properties that do not depend on the
amount of substance, such as density and temperature.
What are extrinsic properties of matter? -ANSWER Properties that depend on the
amount of substance present, such as mass, volume, and pressure.
What is the significance of the oil drop experiment conducted by R.A. Millikan? -
ANSWER It measured the accurate charge and mass of the electron.
What is the atomic number? -ANSWER The number of protons in the nucleus of an
atom, which determines the element's identity.
What is the relationship between protons, neutrons, and atomic mass? -ANSWER
Atomic mass (nucleon) is the sum of protons and neutrons.
What is the process of sublimation? -ANSWER The transition of a substance from solid
to gas without passing through the liquid state.
What is deposition in terms of phase change? -ANSWER The process of gas
transforming directly into solid without becoming liquid.
What is the role of electrons in an atom? -ANSWER Electrons are negatively charged
particles that orbit the nucleus and are involved in chemical bonding.
What is the significance of the cathode ray tube experiment? -ANSWER It demonstrated
the existence of electrons and allowed for the determination of the electron's mass-to-
charge ratio.
What does the Law of Definite Proportions state? -ANSWER Elements combine in fixed
ratios by mass to form compounds.
Who discovered anode rays? -ANSWER Eugene Goldstein.
What is the charge of an atom with atomic number 15 and 18 electrons? -ANSWER -3
What does the acronym RED CAT ELECT IN represent? -ANSWER Reduction occurs at
the Cathode where Electrons enter.
What does VSEPR theory predict? -ANSWER The geometry of a molecule based on
bonded and unbonded electron pairs.
Overview With Detailed Questions And
Correct Answers||Latest Exam 2026-
2027||Already Graded A+
What are the three states of matter? -ANSWER Solid, Liquid, Gas.
What does the Law of Multiple Proportions state? -ANSWER When two elements form
more than one compound, the masses of one element that combine with a fixed mass
of the other can be expressed in small whole number ratios.
Provide an example of the Law of Multiple Proportions. -ANSWER CO (28g/mole) and
CO2 (44g/mole).
What is the fourth state of matter? -ANSWER Plasma, which is the most abundant state
of matter.
What is the significance of the Law of Conservation of Mass? -ANSWER Mass/matter is
always constant; it cannot be created or destroyed.
Who proposed the atomic theory that matter is made up of indivisible atoms? -ANSWER
Democritus.
What was John Dalton's contribution to atomic theory? -ANSWER He proposed that
elements are composed of indivisible atoms and that atoms of different elements differ
in size, mass, and other properties.
What model did J.J. Thompson propose for the atom? -ANSWER The Plum Pudding
model, which depicts electrons embedded in a positively charged framework.
What did Ernest Rutherford discover? -ANSWER The proton and that the atom is mostly
empty space with positive particles concentrated in the nucleus.
What is the atomic model proposed by Neil Bohr? -ANSWER The Planetary model,
which describes electrons orbiting the nucleus in defined paths.
What does Erwin Schrodinger's quantum model estimate? -ANSWER The probability of
finding an electron in certain positions, represented as an electron cloud or orbital.
What is a pure substance? -ANSWER A material with a uniform and definite
composition, which can be an element or a compound.
, What is the difference between a homogeneous mixture and a heterogeneous mixture?
-ANSWER A homogeneous mixture has a uniform composition (e.g., solution), while a
heterogeneous mixture has distinct phases (e.g., suspension, colloid).
What are intrinsic properties of matter? -ANSWER Properties that do not depend on the
amount of substance, such as density and temperature.
What are extrinsic properties of matter? -ANSWER Properties that depend on the
amount of substance present, such as mass, volume, and pressure.
What is the significance of the oil drop experiment conducted by R.A. Millikan? -
ANSWER It measured the accurate charge and mass of the electron.
What is the atomic number? -ANSWER The number of protons in the nucleus of an
atom, which determines the element's identity.
What is the relationship between protons, neutrons, and atomic mass? -ANSWER
Atomic mass (nucleon) is the sum of protons and neutrons.
What is the process of sublimation? -ANSWER The transition of a substance from solid
to gas without passing through the liquid state.
What is deposition in terms of phase change? -ANSWER The process of gas
transforming directly into solid without becoming liquid.
What is the role of electrons in an atom? -ANSWER Electrons are negatively charged
particles that orbit the nucleus and are involved in chemical bonding.
What is the significance of the cathode ray tube experiment? -ANSWER It demonstrated
the existence of electrons and allowed for the determination of the electron's mass-to-
charge ratio.
What does the Law of Definite Proportions state? -ANSWER Elements combine in fixed
ratios by mass to form compounds.
Who discovered anode rays? -ANSWER Eugene Goldstein.
What is the charge of an atom with atomic number 15 and 18 electrons? -ANSWER -3
What does the acronym RED CAT ELECT IN represent? -ANSWER Reduction occurs at
the Cathode where Electrons enter.
What does VSEPR theory predict? -ANSWER The geometry of a molecule based on
bonded and unbonded electron pairs.
