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