Chemistry

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Q. Which of the following statements about alcohols is correct? (2022)
  • A. They are all soluble in water.
  • B. They have higher boiling points than alkanes.
  • C. They cannot form hydrogen bonds.
  • D. They are all volatile.
Q. Which of the following statements about alcohols is incorrect? (2022)
  • A. They can form hydrogen bonds.
  • B. They are generally soluble in water.
  • C. They have higher boiling points than alkanes.
  • D. All alcohols are volatile.
Q. Which of the following statements about chemisorption is true? (2022)
  • A. It is a reversible process
  • B. It involves the formation of strong chemical bonds
  • C. It occurs at low temperatures
  • D. It is independent of the nature of the adsorbate
Q. Which of the following statements about hydrogen is incorrect? (2019)
  • A. Hydrogen is the lightest element.
  • B. Hydrogen can form covalent bonds.
  • C. Hydrogen exists as a diatomic molecule in nature.
  • D. Hydrogen is a metal at room temperature.
Q. Which of the following statements about solutions is true? (2023)
  • A. Solutes increase the boiling point of solvents
  • B. Solutes decrease the freezing point of solvents
  • C. Both A and B
  • D. Neither A nor B
Q. Which of the following statements is true about a galvanic cell? (2020)
  • A. It converts chemical energy to electrical energy
  • B. It requires an external power source
  • C. It is always non-spontaneous
  • D. It operates at constant temperature only
Q. Which of the following statements is true about alkali metals? (2023)
  • A. They are good conductors of electricity
  • B. They have high ionization energies
  • C. They are found in nature in free state
  • D. They form acidic oxides
Q. Which of the following statements is true about alkenes? (2019)
  • A. They contain at least one double bond
  • B. They are saturated hydrocarbons
  • C. They have a general formula of C_nH_(2n+2)
  • D. They cannot undergo addition reactions
Q. Which of the following statements is true about aromatic compounds? (2022)
  • A. They are always saturated
  • B. They contain a benzene ring
  • C. They are non-polar
  • D. They do not undergo electrophilic substitution
Q. Which of the following statements is true about exothermic reactions? (2019)
  • A. They absorb heat.
  • B. They release heat.
  • C. They require energy input.
  • D. They have a positive enthalpy change.
Q. Which of the following statements is true about phenols? (2023)
  • A. They are stronger acids than alcohols
  • B. They do not react with bases
  • C. They are less soluble in water than alcohols
  • D. They are non-toxic
Q. Which of the following statements is true for a galvanic cell? (2020)
  • A. It converts chemical energy to electrical energy
  • B. It requires an external power source
  • C. It is always non-spontaneous
  • D. It operates at constant temperature only
Q. Which of the following statements is true regarding aldehydes? (2023)
  • A. They cannot form hydrogen bonds
  • B. They are generally more reactive than ketones
  • C. They have higher boiling points than ketones
  • D. They are less soluble in water than ketones
Q. Which of the following statements is true regarding exothermic reactions? (2021)
  • A. They absorb heat.
  • B. They release heat.
  • C. They require energy input.
  • D. They have a positive enthalpy change.
Q. Which of the following statements is true regarding ideal gases? (2023)
  • A. They have no volume
  • B. They attract each other
  • C. They occupy no space
  • D. They have mass
Q. Which of the following statements is true regarding the Arrhenius equation? (2023)
  • A. It relates temperature to the rate constant
  • B. It is only applicable to zero-order reactions
  • C. It does not include activation energy
  • D. It is a linear equation
Q. Which of the following statements is true regarding the boiling points of aldehydes and ketones? (2023)
  • A. Aldehydes have higher boiling points than ketones
  • B. Ketones have higher boiling points than aldehydes
  • C. Both have the same boiling points
  • D. None of the above
Q. Which of the following statements is true regarding the complex [Ag(NH3)2]+? (2023)
  • A. It is a tetrahedral complex.
  • B. It is a square planar complex.
  • C. It is a linear complex.
  • D. It is an octahedral complex.
Q. Which of the following statements is true regarding the complex [Cr(NH3)6]3+? (2023)
  • A. It is tetrahedral
  • B. It is octahedral
  • C. It is square planar
  • D. It has a coordination number of 4
Q. Which of the following statements is true regarding the equilibrium constant? (2020)
  • A. Kc is temperature dependent
  • B. Kc is pressure dependent
  • C. Kc is concentration dependent
  • D. Kc is independent of temperature
Q. Which of the following states of matter has the weakest intermolecular forces? (2023)
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Plasma
Q. Which of the following structures has the highest packing efficiency? (2019)
  • A. Simple cubic
  • B. Body-centered cubic
  • C. Face-centered cubic
  • D. Hexagonal close-packed
Q. Which of the following types of solids has the highest melting point? (2019)
  • A. Ionic solids
  • B. Covalent network solids
  • C. Molecular solids
  • D. Metallic solids
Q. Which phase change occurs at the boiling point of a substance? (2022)
  • A. Melting
  • B. Sublimation
  • C. Condensation
  • D. Vaporization
Q. Which polymer is commonly used in the production of fibers for clothing? (2020)
  • A. Polyethylene
  • B. Nylon
  • C. Polystyrene
  • D. Polyvinyl acetate
Q. Which polymer is commonly used in the production of non-stick cookware? (2023)
  • A. Polyethylene
  • B. Polytetrafluoroethylene (PTFE)
  • C. Polypropylene
  • D. Polyvinyl chloride (PVC)
Q. Which polymer is commonly used in the production of synthetic fibers? (2023)
  • A. Polyethylene
  • B. Nylon
  • C. Polystyrene
  • D. Polyvinyl acetate
Q. Which quantum number is not required to describe the electron in an atom? (2019)
  • A. Principal quantum number
  • B. Azimuthal quantum number
  • C. Magnetic quantum number
  • D. Color quantum number
Q. Which reaction is characteristic of carboxylic acids? (2021)
  • A. Esterification
  • B. Hydrogenation
  • C. Halogenation
  • D. Dehydration
Q. Which reaction is used to prepare carboxylic acids from alcohols? (2020)
  • A. Oxidation
  • B. Reduction
  • C. Hydrolysis
  • D. Dehydration
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