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