GCHEMI Yang💚
  • 1. Which branch of Chemistry focuses on the study of carbon compounds?
A) Organic chemistry
B) Biochemistry
C) Inorganic chemistry
D) Physical chemistry
  • 2. which subatomic particle has a positive charge?
A) Electron
B) Proton
C) Nucleus
D) Neutron
  • 3. Milk contains tryptophan, an amino acid that can contribute to feelings of calmness and dowsiness, making it a soothing bedtime beverage.
A) True
B) False
  • 4. What is chemical formula for water?
A) CH4
B) NaCl
C) CO2
D) H2O
  • 5. What is the smallest unit of matter?
A) Molecule
B) Atom
C) Cell
D) Particle
  • 6. Is it okay to eat citrus fruit in an empty stomach?
A) No
B) Yes
  • 7. What is the central of all science?
A) Chemistry
B) Biology
C) Geology
D) Physics
  • 8. Which branch of Chemistry deals with the study of structure, properties and reactions of compounds containing carbon and hydrogen?
A) Inorganic chemistry
B) Physical chemistry
C) Organic chemistry
D) Biochemistry
  • 9. It has a mass and can occupy space
A) Matter
B) Molecule
C) Atom
  • 10. When is the right time to consume milk to get the certain benefits
A) Before Breakfast
B) Before Bedtime
C) Before Lunch
  • 11. Which branch of chemistry deals with the study of matter and the changes it undergoes?
A) Physical chemistry
B) Analytical chemistry
C) Inorganic chemistry
D) Organic chemistry
  • 12. What is chemistry?
A) The study of celestial bodies
B) The study of weather patterns
C) The study of matter and its properties
D) The study of living organisms
  • 13. It is preferably eat fruit before two main meals?
A) No
B) Yes
  • 14. Which branch of chemistry study of chemical processes and reactions that occur within living organisms?
A) Physical chemistry
B) Biochemistry
C) Inorganic chemistry
D) Organic chemistry
  • 15. What should be done at night that should not be done in the morning?
  • 16. __________ Is the study of matter and the substances that constitute it.
A) Physics
B) Chemistry
C) Biology
D) None of these
E) Geology
  • 17. Who discovered the electron?
A) Albert Einstein
B) None of these
C) J.J. Thomson
D) Neis Bohr
E) Marie Curie
  • 18. What is the primary goal of alchemy?
A) To transmute base metais into noble metals
B) To find the cure for common cold
C) To create synthetic polymers
D) To invent the steam engine
E) None of these
  • 19. The Plum Pudding Model was proposed by.
A) J.J. Thomson
B) Emest Rutherford
C) None of these
D) Dalton
E) James Chadwick
  • 20. Which is not a property of matter?
A) Mass
B) None of these
C) Color
D) Volume
E) Emotion
  • 21. The transition from a gas to a solid without becoming a liquid is known as.
A) Sublimation
B) Deposition
C) None of these
D) Freezing
E) Condensation
  • 22. What is an isotope?
A) None of these
B) Atoms with the same number of protons but different numbers of neutrons
C) Atoms with the same number of protons but different numbers of electrons
D) Atoms of different elements with the same mass number
E) Atoms with the same electronic configuration
  • 23. Which model describes the atom as a solid sphere?
A) None of these
B) Dalton's Atomic Theory
C) The Bohr Model
D) The Plum Pudding Model
E) The Quantum Mechanical Model
  • 24. Who first proposed the idea that matter is composed of indivisible atoms?
A) J.J. Thomson
B) Democritus
C) None of these
D) Ernest Rutherford
E) John Dalton
  • 25. ________are found to the left of a chemical equation, before the arrow.
A) Chemical
B) None of these
C) Reactants
D) Equation
  • 26. A________ is a chemical substance that is present at the start of a chemical reaction, and is changed as the chemical reaction proceeds
A) Equation
B) Chemical
C) None of these
D) Reactants
  • 27. An exothermic reaction is one that:
A) Releases heat to the surroundings
B) Does not involve heat exchange
C) None of these
D) Absorbs heat from the surroundings
E) Only occurs at high temperatures
  • 28. Which state of matter has a definite volume but no definite shape?
A) None of these
B) Solid
C) Gas
D) Liquid
E) Plasma
  • 29. What happens to substances during Synthesis Reaction?
A) An element replaces another in a compound
B) Two compounds exchange partners
C) Two or mare substances combine to form a new compound
D) None of these
E) A compound breaks down into simpler substances
  • 30. A molecule is:
A) A group of atoms bonded together
B) None of these
C) A single atom of an element
D) An atom of a noble gas
E) A type of ion
  • 31. What process describes the change from a solid to a gas without passing through the liquid state?
A) Sublimation
B) Vaporization
C) Condensation
D) Deposition
E) None of these
  • 32. hat is the smallest unit of an element that maintains the properties of that element?
A) None of these
B) Atom
C) lon
D) Molecule
E) Compound
  • 33. What is known for the total number of proton and neutron in atom's nucleus
A) Atomic mass
B) Isotopes
C) Atomic number
D) None of these
  • 34. What happens to matter during a chemical reaction?
A) It is created
B) It is destroyed
C) It is neither created nor destroyed
D) None of these
E) It changes into energy
  • 35. The mass number of an atom is determined by adding the number of:
A) Electrons and photons
B) Protons and neutrons
C) Neutrons and electrons
D) None of these
E) Protons and electrons
  • 36. In a double replacement reaction, what occurs?
A) None of these
B) A compound splits into two elements
C) Two elements trade places
D) Two elements form a compound
E) Two compounds exchange ions
  • 37. What state of matter is characterized by having a definite shape and volume?
A) Plasma
B) Solid
C) Gas
D) Liquid
E) None of these
  • 38. What is the term used to describe the amount of space that a substance occupies?
A) Mass
B) Density
C) Weight
D) None of these
E) Volume
  • 39. What is known for the number of protons in the nucleus of an atom.
A) None of these
B) Atomic mass
C) Atomic number
D) Isotopes
  • 40. A reaction that absorbs energy in the form of heat is called:
A) None of these
B) Energetic
C) Exothermic
D) Endothermic
E) Thermodynamic
  • 41. Which mythical substance is said to grant immortality?
A) Ambrosia
B) Manna
C) Elixir of Life
D) None of these
E) Philosopher's stone
  • 42. Which of the following is NOT a characteristic of a chemical change?
A) Release or absorption of energy
B) Change in color
C) Change in shape
D) None of these
E) Production of gas
  • 43. What is the types of reactions which a complex molecule breaks down to make simpler ones.
A) Decomposition reaction
B) Redox Reaction
C) None of these
D) Synthesis Reaction
  • 44. In a chemical equation, reactants are found on the ______ side.
A) Top
B) None of these
C) Bottom
D) Left
E) Right
  • 45. Who is the father of Chemistry?
A) Roberto
B) Jabir ibn hayyan
C) Albert Einstein
D) Charles Babbage
E) None of these
  • 46. Who is the father of modern Chemistry?
A) Jabir ibn hayyan
B) Charles Babbage
C) Antoine Lavoisier
D) Albert Einstein
E) None of these
  • 47. refers to the composition and arrangement of
    subatomic particles within an atom.
A) Atomic structure
B) Atomic number
C) None of these
D) Atomic mass
E) Isotopes
  • 48. positively charged
A) Electrons
B) Neutrons
C) Protons
D) Nucleus
E) None of these
  • 49. uncharged
A) Protons
B) Neutrons
C) Electrons
D) None of these
E) Nucleus
  • 50. negatively charged
A) Neutrons
B) None of these
C) Protons
D) Nucleus
E) Electrons
  • 51. Three main components of atomic structure
A) All of these
B) Electrons
C) Neutrons
D) Protons
E) None of these
  • 52. central core
A) Protons
B) Nucleus
C) Electrons
D) Neutrons
E) None of these
  • 53. Theory Law of conservation of mass.
A) None of these
B) Dalton
C) Ernest Rutherford
D) James Chadwick
E) J.J. Thompson
  • 54. group of atoms that has an electric charge
A) None of these
B) Mass
C) Atom
D) Ion
E) Matter
  • 55. It is neither created nor destroyed
A) None of these
B) Dalton
C) Ernest Rutherford
D) James Chadwick
E) J.J Thompson
  • 56. Every matter is made up of;
A) Molecule
B) Ion
C) Atom
D) Mass
E) None of these
  • 57. ________is the submation of proton and nuetron.
A) Atom
B) None of these
C) Electrons
D) Nucleus
E) mass
  • 58. Electron external
A) Electron shell
B) Nucleus shell
C) Proton shell
D) Nuetron shell
E) None of these
  • 59. What are the three isotopes of hydrogen?
A) Tritium
B) Deuterium
C) Protium
D) None of these
E) All of these
  • 60. Protium
A) contains 1 proton, 1 electron, and no neutrons.
B) It can also be noted that this isotope of hydrogen is radioactive.
C) None of these
D) contains 1 proton, 1 electron, and 2 neutrons.
E) contains 1 proton, 1 electron, and 1 neutron.
  • 61. Deuterium
A) None of these
B) contains 1 proton, 1 electron, and 1 neutron.
C) It can also be noted that this isotope of hydrogen is radioactive.
D) contains 1 proton, 1 electron, and no neutrons.
E) contains 1 proton,1 electron, and 2 neutrons.
  • 62. Tritium
A) contains 1 proton, 1 electron, and no neutrons.
B) None of these
C) contains 1 proton, 1 electron, and 1 neutron.
D) contains 1 proton, 1 electron, and 2 neutrons.
  • 63. It has a tube made of glass which has two openings, one for the vacuum pump and the other for the inlet
    through which a gas is pumped in.
A) Cathode Tube
B) None of these
C) Cathode Ray Experiment
D) plum pudding
  • 64. is a scientific representation that describes the
    structure and behavior of atoms.
A) Atomic mass
B) Atomic model
C) None of these
D) Atomic structure
E) Atomic number
  • 65. have been proposed and refined based on
    experimental evidence and theoretical advancements.
A) Atomic model
B) Atomic number
C) Atomic mass
D) None of these
E) Atomic structure
  • 66. Dalton's Model
A) 1803
B) 1890
C) 1897
D) None of these
E) 1913
  • 67. Thomson's Model
A) None of these
B) 1913
C) 1897
D) 1803
E) 1890
  • 68. Bohr's Model
A) None of these
B) 1913
C) 1803
D) 1890
E) 1897
  • 69. Bohr proposed that electrons occupy specific energy levels or orbits around the nucleus.
A) Quantized Energy
B) None of these
C) Fixed Orbits
D) Energy Transitions
E) Electron Energy Levels
  • 70. According to Bohr's model, electrons
    move in circular orbits around the nucleus.
A) Electron Energy Levels
B) None of these
C) Fixed Orbits
D) Quantized Energy
E) Energy Transitions
  • 71. These orbits have fixed radii and are referred to as "stationary states."Electrons in stationary states do not radiate energy and remain stable.
A) None of these
B) Electron Energy Levels
C) Energy Transitions
D) Quantized Energy
E) Fixed Orbits
  • 72. These energy levels are quantized, meaning that electrons can only exist in certain discrete energy
    state.
A) Electron Energy Levels
B) Quantized Energy
C) Fixed Orbits
D) Energy Transitions
E) None of these
  • 73. Each energy level is associated with a specific
    amount of energy.
A) Quantized Energy
B) Electron Energy Levels
C) Fixed Orbits
D) Energy Transitions
E) None of these
  • 74. Electrons can transition between energy levels by absorbing or emitting energy in discrete amounts. When an electron absorbs energy, it moves to a higher energy level (excited state).
A) Fixed Orbits
B) Energy Transitions
C) Quantized Energy
D) None of these
E) Electron Energy Levels
  • 75. Conversely, when an electron emits energy, it moves to
    a lower energy level (ground state) and releases the
    excess energy as electromagnetic radiation.
A) Energy Transitions
B) None of these
C) Quantized Energy
D) Electron Energy Levels
E) Fixed Orbits
  • 76. Bohr's model introduced the concept
    of quantized energy levels for electrons.
A) None of these
B) Electron Energy Levels
C) Fixed Orbits
D) Energy Transitions
E) Quantized Energy
  • 77. The energy of an electron in a particular energy level is inversely proportional to the radius of its orbit.
A) Energy Transitions
B) Quantized Energy
C) Electron Energy Levels
D) None of these
E) Fixed Orbits
  • 78. __________is a process in which one or more substances,called reactants, are transformed into new
    substances, called products, through the rearrangement of atoms.
A) Isotopes
B) Reactants
C) None of these
D) Chemical reactions
  • 79. Types of reactions
A) 7
B) 6
C) 5
D) None of these
E) 4
  • 80. In a synthesis reaction, two or more chemical species
    combine to form a more complex
A) Double Displacement or Metathesis Reaction
B) None of these
C) Decomposition Reaction
D) Displacement or Replacement Reaction
E) Synthesis or Combination Reaction
  • 81. In this type of reaction, one element is replaced by another in a
    compound.
A) Displacement or Replacement Reaction
B) Synthesis or Combination Reaction
C) Decomposition Reaction
D) Double Displacement or Metathesis Reaction
  • 82. This involves the exchange of ions between two compounds.
A) None of these
B) Displacement or Replacement Reaction
C) Synthesis or Combination Reaction
D) Double Displacement or Metathesis Reaction
E) Decomposition Reaction
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