Chemistry

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Q. What is the primary characteristic of a redox reaction? (2023)
  • A. Transfer of protons
  • B. Transfer of electrons
  • C. Change in temperature
  • D. Change in pressure
Q. What is the primary characteristic of alkaline earth metals? (2020)
  • A. They are highly reactive
  • B. They have a +2 oxidation state
  • C. They are gases at room temperature
  • D. They form covalent bonds
Q. What is the primary characteristic of amorphous solids? (2023)
  • A. Long-range order
  • B. Short-range order
  • C. Definite melting point
  • D. High thermal conductivity
Q. What is the primary difference between physisorption and chemisorption? (2023)
  • A. Physisorption is stronger than chemisorption
  • B. Chemisorption involves chemical bonds, while physisorption involves van der Waals forces
  • C. Physisorption is irreversible, while chemisorption is reversible
  • D. Chemisorption occurs at lower temperatures than physisorption
Q. What is the primary factor affecting the rate of a chemical reaction? (2022)
  • A. Concentration
  • B. Temperature
  • C. Catalyst
  • D. All of the above
Q. What is the primary force holding the atoms together in covalent network solids? (2022)
  • A. Ionic bonds
  • B. Covalent bonds
  • C. Metallic bonds
  • D. Van der Waals forces
Q. What is the primary force holding together the atoms in a metallic solid? (2020)
  • A. Ionic bonds
  • B. Covalent bonds
  • C. Metallic bonds
  • D. Van der Waals forces
Q. What is the primary force holding together the atoms in metallic solids? (2020)
  • A. Ionic bonds
  • B. Covalent bonds
  • C. Metallic bonds
  • D. Van der Waals forces
Q. What is the primary function of antibiotics? (2020)
  • A. Pain relief
  • B. Bacterial infection treatment
  • C. Viral infection treatment
  • D. Fungal infection treatment
Q. What is the primary function of antioxidants in food? (2022)
  • A. Enhance flavor
  • B. Preserve color
  • C. Prevent oxidation
  • D. Increase sweetness
Q. What is the primary function of antioxidants in the body? (2020)
  • A. Increase energy
  • B. Prevent oxidation
  • C. Enhance digestion
  • D. Boost immunity
Q. What is the primary function of antioxidants in the human body? (2020)
  • A. Increase energy
  • B. Prevent oxidation
  • C. Enhance digestion
  • D. Boost immunity
Q. What is the primary function of cholesterol in the body? (2023)
  • A. Energy storage
  • B. Hormone production
  • C. Protein synthesis
  • D. Carbohydrate metabolism
Q. What is the primary oxidation state of carbon in carbon dioxide (CO2)? (2020)
  • A. +2
  • B. +4
  • C. 0
  • D. -4
Q. What is the primary oxidation state of iron in FeCl3? (2023)
  • A. +2
  • B. +3
  • C. +4
  • D. +6
Q. What is the primary oxidation state of lead in lead(II) oxide (PbO)? (2019)
  • A. +2
  • B. +4
  • C. 0
  • D. -2
Q. What is the primary oxidation state of nitrogen in ammonia (NH3)? (2021)
  • A. -3
  • B. +1
  • C. +3
  • D. +5
Q. What is the primary oxidation state of nitrogen in nitric acid (HNO3)? (2023)
  • A. +1
  • B. +3
  • C. +5
  • D. 0
Q. What is the primary product of the electrolysis of water? (2023)
  • A. Hydrogen
  • B. Oxygen
  • C. Hydrogen Peroxide
  • D. Ozone
Q. What is the primary product of the reaction between hydrogen and chlorine? (2019)
  • A. Hydrochloric acid
  • B. Hydrogen chloride
  • C. Chlorine gas
  • D. Water
Q. What is the primary product of the thermal decomposition of calcium carbonate? (2019)
  • A. Calcium oxide
  • B. Calcium hydroxide
  • C. Calcium bicarbonate
  • D. Calcium chloride
Q. What is the primary product when aluminum reacts with hydrochloric acid? (2020)
  • A. AlCl3
  • B. H2
  • C. Al(OH)3
  • D. Al2Cl6
Q. What is the primary product when lithium reacts with nitrogen? (2022)
  • A. Lithium nitride
  • B. Lithium oxide
  • C. Lithium hydroxide
  • D. Lithium carbonate
Q. What is the primary product when potassium permanganate (KMnO4) is reduced in acidic medium? (2019)
  • A. MnO2
  • B. Mn2+
  • C. MnO4-
  • D. KMnO4
Q. What is the primary source of sulfur dioxide in the atmosphere? (2020)
  • A. Volcanic eruptions
  • B. Automobile emissions
  • C. Industrial processes
  • D. Natural gas combustion
Q. What is the primary type of bonding in metallic solids? (2020)
  • A. Ionic bonding
  • B. Covalent bonding
  • C. Metallic bonding
  • D. Hydrogen bonding
Q. What is the primary use of boron in the industry? (2023)
  • A. Fertilizers
  • B. Glass production
  • C. Detergents
  • D. Pharmaceuticals
Q. What is the primary use of calcium carbonate? (2019)
  • A. As a fertilizer
  • B. In the production of glass
  • C. As a building material
  • D. In antacids
Q. What is the primary use of glycerol in the food industry? (2023)
  • A. Sweetener
  • B. Preservative
  • C. Thickening agent
  • D. Flavor enhancer
Q. What is the primary use of lithium in batteries? (2023)
  • A. As a conductor
  • B. As a cathode material
  • C. As an anode material
  • D. As an electrolyte
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