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