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