Chemistry (School & UG)

Q. What is the correct IUPAC name for the compound CH3-CH2-CH(CH3)-COOH?
  • A. 3-methylbutanoic acid
  • B. 2-methylbutanoic acid
  • C. 4-methylbutanoic acid
  • D. 2-methylpropanoic acid
Q. What is the correct IUPAC name for the compound CH3-CH2-CH(CH3)-OH?
  • A. 2-Propanol
  • B. 1-Butanol
  • C. 3-Methyl-1-butanol
  • D. 2-Methyl-1-propanol
Q. What is the correct IUPAC name for the compound with the formula C4H10O?
  • A. Butanol
  • B. Butan-1-ol
  • C. 2-Butanol
  • D. Butan-2-ol
Q. What is the correct IUPAC name for the compound with the structure CH3-CH(CH3)-CH2-CHO?
  • A. 3-Methylbutanal
  • B. 2-Methylbutanal
  • C. 4-Methylbutanal
  • D. Pentanal
Q. What is the correct IUPAC name for the compound with the structure CH3-CH(CH3)-CH2-CH3?
  • A. 2-methylbutane
  • B. 3-methylbutane
  • C. 2-pentene
  • D. 2-pentanol
Q. What is the correct IUPAC name for the compound with the structure CH3-CH(CH3)-C(=O)-OH?
  • A. 3-Methylbutanoic acid
  • B. 2-Methylbutanoic acid
  • C. 2-Hydroxy-3-methylbutanoic acid
  • D. 3-Hydroxy-2-methylbutanoic acid
Q. What is the correct IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-C(CH3)2-CH3?
  • A. 3,3-dimethylpentane
  • B. 2,2-dimethylhexane
  • C. 2-methylhexane
  • D. 3-methylpentane
Q. What is the correct IUPAC name for the compound with the structure CH3-CH2-CH(CH3)-CH2-CH3?
  • A. 3-methylpentane
  • B. 2-methylpentane
  • C. 4-methylpentane
  • D. 2,3-dimethylbutane
Q. What is the correct IUPAC name for the compound with the structure CH3-CH2-COOH?
  • A. Propanoic acid
  • B. Butanoic acid
  • C. Acetic acid
  • D. Isobutyric acid
Q. What is the critical point of a substance?
  • A. The temperature at which a substance can exist as a solid
  • B. The temperature and pressure at which gas and liquid phases are indistinguishable
  • C. The point at which a substance boils
  • D. The temperature at which a substance freezes
Q. What is the effect of a catalyst on a system at equilibrium?
  • A. Shifts the equilibrium position
  • B. Increases the rate of reaction
  • C. Decreases the equilibrium constant
  • D. Has no effect on the reaction
Q. What is the effect of a catalyst on the activation energy of a reaction?
  • A. Increases activation energy
  • B. Decreases activation energy
  • C. Has no effect on activation energy
  • D. Changes the reaction mechanism
Q. What is the effect of a catalyst on the enthalpy change of a reaction?
  • A. Increases the enthalpy change
  • B. Decreases the enthalpy change
  • C. Has no effect on the enthalpy change
  • D. Reverses the enthalpy change
Q. What is the effect of a higher concentration of reactants on the rate of a reaction?
  • A. Rate decreases
  • B. Rate increases
  • C. Rate remains constant
  • D. Rate becomes zero
Q. What is the effect of a methoxy group on the reactivity of a benzene ring in electrophilic substitution?
  • A. Deactivating and ortho/para directing
  • B. Deactivating and meta directing
  • C. Activating and ortho/para directing
  • D. Activating and meta directing
Q. What is the effect of a nitro group on the reactivity of a benzene ring in electrophilic substitution?
  • A. Activates the ring
  • B. Deactivates the ring
  • C. No effect
  • D. Makes the ring non-reactive
Q. What is the effect of a strong electron-donating group on the rate of electrophilic aromatic substitution?
  • A. Decreases the rate
  • B. Increases the rate
  • C. No effect
  • D. Reverses the reaction
Q. What is the effect of adding a catalyst to a reaction at equilibrium?
  • A. Shifts the equilibrium to the right
  • B. Shifts the equilibrium to the left
  • C. No effect on equilibrium position
  • D. Increases the concentration of products
Q. What is the effect of adding a strong acid to a reaction at equilibrium involving a weak base?
  • A. Shifts equilibrium to the right
  • B. Shifts equilibrium to the left
  • C. No effect on equilibrium
  • D. Increases reaction rate
Q. What is the effect of adding an inert gas at constant volume to a reaction at equilibrium?
  • A. Shifts equilibrium to the right
  • B. Shifts equilibrium to the left
  • C. No effect on equilibrium
  • D. Increases the reaction rate
Q. What is the effect of decreasing the volume of a gaseous reaction mixture at equilibrium?
  • A. Shifts to the side with more moles of gas
  • B. Shifts to the side with fewer moles of gas
  • C. No effect
  • D. Increases the temperature
Q. What is the effect of hydrogen bonding on the boiling point of water?
  • A. Increases boiling point
  • B. Decreases boiling point
  • C. No effect
  • D. Varies with pressure
Q. What is the effect of increasing atomic number on electronegativity within a group?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It fluctuates
Q. What is the effect of increasing temperature on the cell potential of an electrochemical reaction?
  • A. Increases cell potential.
  • B. Decreases cell potential.
  • C. No effect on cell potential.
  • D. Depends on the reaction.
Q. What is the effect of increasing temperature on the enthalpy of a reaction that is endothermic?
  • A. Increases ΔH
  • B. Decreases ΔH
  • C. No effect on ΔH
  • D. Reverses the reaction
Q. What is the effect of increasing temperature on the enthalpy of a substance?
  • A. Enthalpy decreases
  • B. Enthalpy increases
  • C. Enthalpy remains constant
  • D. Enthalpy becomes negative
Q. What is the effect of increasing temperature on the rate of a chemical reaction according to the Arrhenius equation?
  • A. Rate decreases
  • B. Rate remains constant
  • C. Rate increases exponentially
  • D. Rate increases linearly
Q. What is the effect of increasing temperature on the rate of an electrochemical reaction?
  • A. Decreases rate
  • B. Increases rate
  • C. No effect
  • D. Reverses reaction
Q. What is the effect of increasing the concentration of a reactant in a titration?
  • A. Increases the volume of titrant needed
  • B. Decreases the volume of titrant needed
  • C. Has no effect on the titration
  • D. Changes the endpoint color
Q. What is the effect of increasing the electronegativity difference between two bonded atoms?
  • A. Increases bond length
  • B. Decreases bond strength
  • C. Increases ionic character
  • D. Decreases dipole moment
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