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