Chemistry (School & UG)

Q. What is the primary factor affecting the periodic trends in atomic size?
  • A. Nuclear charge
  • B. Electron shielding
  • C. Electron affinity
  • D. Electronegativity
Q. What is the primary factor affecting the rate of a surface reaction?
  • A. Surface area of the reactants
  • B. Temperature of the reactants
  • C. Concentration of the reactants
  • D. Pressure of the reactants
Q. What is the primary factor affecting the rate of a titration reaction?
  • A. Concentration of reactants
  • B. Temperature of the solution
  • C. Volume of the titrant
  • D. All of the above
Q. What is the primary factor that affects the rate of diffusion of a gas?
  • A. Molar mass of the gas
  • B. Temperature of the gas
  • C. Pressure of the gas
  • D. Volume of the gas
Q. What is the primary factor that determines the acidity of a compound?
  • A. Electronegativity
  • B. Molecular weight
  • C. Atomic radius
  • D. Bond length
Q. What is the primary factor that determines the acidity of a solution?
  • A. Concentration of hydroxide ions
  • B. Concentration of hydrogen ions
  • C. Temperature
  • D. Pressure
Q. What is the primary factor that determines the atomic radius of an element?
  • A. Number of protons
  • B. Number of neutrons
  • C. Number of electron shells
  • D. Number of valence electrons
Q. What is the primary factor that determines the color of transition metal complexes?
  • A. The oxidation state of the metal
  • B. The type of ligands
  • C. The coordination number
  • D. The size of the metal ion
Q. What is the primary factor that determines the polarity of a molecule?
  • A. Molecular weight
  • B. Shape of the molecule
  • C. Number of bonds
  • D. Type of atoms involved
Q. What is the primary factor that determines the rate of a reaction according to the Arrhenius equation?
  • A. Temperature
  • B. Concentration
  • C. Surface area
  • D. Catalyst presence
Q. What is the primary factor that determines the rate of diffusion of a gas?
  • A. Molecular weight
  • B. Temperature
  • C. Pressure
  • D. Volume
Q. What is the primary factor that determines the shape of a molecule according to VSEPR theory?
  • A. Electronegativity
  • B. Lone pairs of electrons
  • C. Molecular weight
  • D. Bond length
Q. What is the primary factor that determines the state of matter of a substance?
  • A. Temperature
  • B. Pressure
  • C. Intermolecular forces
  • D. Molecular weight
Q. What is the primary factor that determines the strength of a covalent bond?
  • A. Electronegativity
  • B. Bond length
  • C. Bond order
  • D. Molecular weight
Q. What is the primary function of a burette in titration?
  • A. To mix solutions
  • B. To measure the volume of titrant added
  • C. To heat the solution
  • D. To cool the solution
Q. What is the primary function of a chromatographic column?
  • A. To mix the sample with the mobile phase
  • B. To provide a surface for separation
  • C. To detect the analytes
  • D. To control the temperature
Q. What is the primary function of a galvanic cell?
  • A. Convert chemical energy to electrical energy
  • B. Store electrical energy
  • C. Generate heat
  • D. Facilitate chemical reactions
Q. What is the primary function of a mass spectrometer?
  • A. To measure absorbance of light
  • B. To separate ions based on their mass-to-charge ratio
  • C. To detect electrical conductivity
  • D. To analyze pH levels
Q. What is the primary function of a salt bridge in an electrochemical cell?
  • A. To provide a source of electrons
  • B. To maintain charge balance
  • C. To increase conductivity
  • D. To facilitate ion exchange
Q. What is the primary function of baking soda in baking?
  • A. Leavening agent
  • B. Flavor enhancer
  • C. Preservative
  • D. Coloring agent
Q. What is the primary function of flux in metallurgy?
  • A. To increase temperature
  • B. To facilitate reduction
  • C. To remove impurities
  • D. To enhance conductivity
Q. What is the primary interaction of UV-Vis spectroscopy with a sample?
  • A. Scattering of light
  • B. Absorption of light
  • C. Emission of light
  • D. Reflection of light
Q. What is the primary interaction that occurs in UV-Vis spectroscopy?
  • A. Vibrational transitions
  • B. Rotational transitions
  • C. Electronic transitions
  • D. Nuclear transitions
Q. What is the primary mechanism by which addition polymers are formed?
  • A. Nucleophilic substitution
  • B. Electrophilic addition
  • C. Free radical mechanism
  • D. Electrophilic substitution
Q. What is the primary mechanism by which adsorption occurs on a solid surface?
  • A. Physical adsorption
  • B. Chemical adsorption
  • C. Ion exchange
  • D. Covalent bonding
Q. What is the primary method for extracting iron from its ore?
  • A. Electrolysis
  • B. Carbon reduction
  • C. Hydrometallurgy
  • D. Biomining
Q. What is the primary method of extracting copper from its sulfide ores?
  • A. Electrolysis
  • B. Roasting
  • C. Smelting
  • D. Leaching
Q. What is the primary method used to extract aluminum from its ore, bauxite?
  • A. Electrolysis
  • B. Roasting
  • C. Hydrometallurgy
  • D. Smelting
Q. What is the primary oxidation state of chromium in chromate ions?
  • A. +2
  • B. +3
  • C. +4
  • D. +6
Q. What is the primary oxidation state of chromium in Cr2O7^2-?
  • A. +2
  • B. +3
  • C. +6
  • D. +7
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