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