Chemistry

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Q. What is the main product when ethene reacts with water in the presence of an acid? (2023)
  • A. Ethanol
  • B. Ethane
  • C. Acetic acid
  • D. Ethylene glycol
Q. What is the main product when hydrogen reacts with oxygen? (2019)
  • A. Water
  • B. Hydrogen peroxide
  • C. Ozone
  • D. Hydroxide
Q. What is the main product when propan-2-one is treated with sodium borohydride? (2023)
  • A. Propan-1-ol
  • B. Propan-2-ol
  • C. Propan-3-ol
  • D. No reaction
Q. What is the main product when propanal is treated with sodium bisulfite? (2019)
  • A. Sodium propanoate
  • B. Propyl sulfonate
  • C. Propane-1,2-diol
  • D. A bisulfite adduct
Q. What is the main role of dietary fiber in human health? (2021)
  • A. Increase cholesterol
  • B. Aid digestion
  • C. Provide energy
  • D. Enhance taste
Q. What is the main source of omega-3 fatty acids? (2021)
  • A. Fish oil
  • B. Butter
  • C. Coconut oil
  • D. Olive oil
Q. What is the maximum number of electrons that can be accommodated in the d subshell? (2019)
  • A. 2
  • B. 6
  • C. 10
  • D. 14
Q. What is the maximum number of electrons that can be accommodated in the p subshell? (2023)
  • A. 2
  • B. 6
  • C. 10
  • D. 14
Q. What is the molality of a solution containing 3 moles of solute in 1 kg of solvent? (2022)
  • A. 3 m
  • B. 1.5 m
  • C. 0.5 m
  • D. 2 m
Q. What is the molality of a solution containing 3 moles of solute in 500 g of solvent? (2021)
  • A. 6 m
  • B. 3 m
  • C. 1.5 m
  • D. 0.5 m
Q. What is the molecular formula of cyclohexane? (2022)
  • A. C6H12
  • B. C6H10
  • C. C6H14
  • D. C6H6
Q. What is the molecular formula of ethyne? (2022)
  • A. C2H2
  • B. C2H4
  • C. C2H6
  • D. C3H4
Q. What is the molecular formula of the simplest alkyne? (2022)
  • A. C2H2
  • B. C2H4
  • C. C3H4
  • D. C3H6
Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L atm/K mol) (2020)
  • A. 2.06 atm
  • B. 0.82 atm
  • C. 1.01 atm
  • D. 0.25 atm
Q. What is the osmotic pressure of a solution containing 0.1 moles of glucose in 1 L of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
  • A. 2.03 atm
  • B. 1.96 atm
  • C. 0.82 atm
  • D. 0.25 atm
Q. What is the osmotic pressure of a solution containing 0.1 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
  • A. 2.5 atm
  • B. 0.82 atm
  • C. 1.0 atm
  • D. 0.25 atm
Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (2021)
  • A. 12.3 atm
  • B. 24.6 atm
  • C. 6.1 atm
  • D. 3.1 atm
Q. What is the osmotic pressure of a solution containing 0.5 moles of solute in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2021)
  • A. 12.3 atm
  • B. 10.2 atm
  • C. 8.2 atm
  • D. 6.1 atm
Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (R = 0.0821 L·atm/(K·mol)) (2020)
  • A. 0.82 atm
  • B. 1.64 atm
  • C. 2.46 atm
  • D. 4.92 atm
Q. What is the osmotic pressure of a solution containing 2 moles of glucose in 1 liter of solution at 25 °C? (2021)
  • A. 0.0821 atm
  • B. 1.0 atm
  • C. 2.0 atm
  • D. 4.0 atm
Q. What is the oxidation state of nitrogen in NH4Cl? (2023)
  • A. -3
  • B. +3
  • C. +1
  • D. 0
Q. What is the packing efficiency of a body-centered cubic (BCC) structure? (2020)
  • A. 52%
  • B. 68%
  • C. 74%
  • D. 100%
Q. What is the pH of a solution with a hydrogen ion concentration of 1 x 10^-3 M? (2019)
  • A. 1
  • B. 3
  • C. 7
  • D. 10
Q. What is the primary active ingredient in aspirin? (2019)
  • A. Acetylsalicylic acid
  • B. Salicylic acid
  • C. Acetic acid
  • D. Benzoic acid
Q. What is the primary benefit of probiotics? (2023)
  • A. Increase weight
  • B. Improve gut health
  • C. Enhance vision
  • D. Boost hair growth
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
Showing 181 to 210 of 569 (19 Pages)
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