Chemistry

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Q. What is the pKa range of most carboxylic acids?
  • A. 0-1
  • B. 4-5
  • C. 8-9
  • D. 10-11
Q. What is the pKb value of a weak base like aniline? (2020)
  • A. Less than 5
  • B. Around 9
  • C. Around 14
  • D. Greater than 15
Q. What is the pKb value of a weak base like methylamine?
  • A. Less than 7
  • B. Equal to 7
  • C. Greater than 7
  • D. Undefined
Q. What is the primary characteristic of adsorption? (2023)
  • A. It is a bulk phenomenon.
  • B. It involves a chemical reaction.
  • C. It is a surface phenomenon.
  • D. It requires high temperature.
Q. What is the primary characteristic of gases compared to solids and liquids? (2023)
  • A. Definite shape
  • B. Definite volume
  • C. High compressibility
  • D. Low density
Q. What is the primary characteristic of gases? (2023)
  • A. Definite shape
  • B. Definite volume
  • C. Compressibility
  • D. Incompressibility
Q. What is the primary component of natural gas? (2020)
  • A. Ethane
  • B. Propane
  • C. Methane
  • D. Butane
Q. What is the primary component of the cell membrane?
  • A. Proteins
  • B. Carbohydrates
  • C. Phospholipids
  • D. Nucleic Acids
Q. What is the primary difference between liquids and gases? (2023)
  • A. Shape
  • B. Volume
  • C. Compressibility
  • D. Density
Q. What is the primary difference between solids and liquids in terms of particle arrangement? (2023)
  • A. Solids have loosely packed particles
  • B. Liquids have tightly packed particles
  • C. Solids have fixed shape and volume
  • D. Liquids have fixed shape but variable volume
Q. What is the primary factor affecting the rate of adsorption of a gas on a solid surface?
  • A. Temperature
  • B. Pressure
  • C. Surface area
  • D. Molecular weight
Q. What is the primary function of proteins in the body? (2023)
  • A. Energy storage
  • B. Catalyzing biochemical reactions
  • C. Genetic information storage
  • D. Cell membrane structure
Q. What is the primary function of proteins in the body? (2023) 2023
  • A. Energy storage
  • B. Catalyzing biochemical reactions
  • C. Genetic information storage
  • D. Cell membrane structure
Q. What is the primary gas in the Earth's atmosphere? (2022)
  • A. Oxygen
  • B. Nitrogen
  • C. Carbon Dioxide
  • D. Hydrogen
Q. What is the primary mechanism of adsorption in activated charcoal?
  • A. Chemical bonding
  • B. Physical adsorption
  • C. Capillary action
  • D. Electrostatic attraction
Q. What is the primary process involved in adsorption? (2023)
  • A. Chemical reaction
  • B. Physical attraction
  • C. Evaporation
  • D. Condensation
Q. What is the primary process involved in the adsorption of gases on solid surfaces? (2022) 2022
  • A. Diffusion
  • B. Condensation
  • C. Chemical reaction
  • D. Van der Waals forces
Q. What is the primary process involved in the formation of a colloidal solution? (2022)
  • A. Evaporation
  • B. Condensation
  • C. Dispersion
  • D. Sublimation
Q. What is the primary reason for the high compressibility of gases?
  • A. Large intermolecular spaces
  • B. Strong intermolecular forces
  • C. Low temperature
  • D. High pressure
Q. What is the primary reason for the high electronegativity of halogens? (2020)
  • A. Large atomic size
  • B. High ionization energy
  • C. Low electron affinity
  • D. High atomic mass
Q. What is the primary reason for the variable oxidation states of transition metals?
  • A. Presence of d-electrons
  • B. High atomic mass
  • C. Low ionization energy
  • D. High electronegativity
Q. What is the primary reason that gases can be compressed more than liquids or solids?
  • A. High density
  • B. Low density
  • C. Large intermolecular spaces
  • D. Strong intermolecular forces
Q. What is the primary use of boron in industry? (2019) 2019
  • A. Fertilizers
  • B. Glass production
  • C. Metallurgy
  • D. Pharmaceuticals
Q. What is the primary use of polyethylene?
  • A. Insulation
  • B. Packaging
  • C. Textiles
  • D. Adhesives
Q. What is the primary use of polystyrene?
  • A. Insulation
  • B. Packaging
  • C. Textiles
  • D. Adhesives
Q. What is the primary use of sulfuric acid (H2SO4)? (2022)
  • A. Fertilizer
  • B. Battery acid
  • C. Detergent
  • D. Food preservative
Q. What is the principal quantum number for the outermost electron in sodium (Na)? (2022) 2022
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. What is the principal quantum number for the outermost electrons in sodium (Na)? (2023) 2023
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. What is the process of a solid turning directly into a gas called? (2021)
  • A. Condensation
  • B. Sublimation
  • C. Evaporation
  • D. Deposition
Q. What is the process of forming a polymer from monomers called?
  • A. Polymerization
  • B. Condensation
  • C. Sublimation
  • D. Depolymerization
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