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