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