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Chemical Education and Pedagogy Online MCQs with Answers
Which of the following is an example of a chemical change?
a) Boiling water
b) Dissolving sugar in water
c) Melting ice
d) Burning wood
What is the SI unit of temperature?
a) Celsius
b) Kelvin
c) Fahrenheit
d) Rankine
Which of the following is an example of a heterogeneous mixture?
a) Saltwater
b) Air
c) Vinegar
d) Soil
The process of converting a gas to a liquid is called:
a) Evaporation
b) Condensation
c) Sublimation
d) Deposition
Which subatomic particle has a positive charge?
a) Proton
b) Neutron
c) Electron
d) Nucleus
What is the chemical symbol for gold?
a) Au
b) Ag
c) Hg
d) Fe
Which of the following elements is a metal?
a) Carbon
b) Oxygen
c) Chlorine
d) Sodium
What is the atomic number of oxygen?
a) 6
b) 8
c) 16
d) 32
The pH scale is used to measure the acidity or alkalinity of a substance. What is the pH value of a neutral solution?
a) 0
b) 7
c) 14
d) 10
Which of the following is an example of an exothermic reaction?
a) Photosynthesis
b) Combustion
c) Electrolysis
d) Respiration
What is the chemical formula for water?
a) H2O
b) CO2
c) NaCl
d) CH4
Which of the following is an example of a renewable energy source?
a) Coal
b) Natural gas
c) Solar power
d) Petroleum
The process of combining elements to form a new substance is called:
a) Decomposition
b) Synthesis
c) Ionization
d) Reduction
What is the molar mass of carbon dioxide (CO2)?
a) 16 g/mol
b) 22 g/mol
c) 44 g/mol
d) 12 g/mol
Which of the following is the correct electron configuration for nitrogen (N)?
a) 1s2 2s2 2p3
b) 1s2 2s2 2p6
c) 1s2 2s2 2p5
d) 1s2 2s2 2p4
What is the process of converting a solid directly to a gas without going through the liquid phase called?
a) Melting
b) Sublimation
c) Evaporation
d) Condensation
Which of the following is an example of an endothermic reaction?
a) Freezing water
b) Rusting iron
c) Digesting food
d) Mixing vinegar and baking soda
The process of removing impurities from a substance by heating it to a high temperature is called:
a) Filtration
b) Distillation
c) Crystallization
d) Sublimation
Which of the following is an example of a homogeneous mixture?
a) Orange juice with pulp
b) Granite
c) Air
d) Sand and water
What is the chemical formula for methane?
a) CH4
b) C2H6
c) CO2
d) H2O
Which of the following is a strong acid?
a) Acetic acid (CH3COOH)
b) Hydrochloric acid (HCl)
c) Carbonic acid (H2CO3)
d) Sulfuric acid (H2SO4)
Which of the following is a noble gas?
a) Helium
b) Nitrogen
c) Oxygen
d) Carbon
The process of a substance changing from a gas to a solid without going through the liquid phase is called:
a) Melting
b) Sublimation
c) Evaporation
d) Condensation
Which of the following is the correct electron configuration for sodium (Na)?
a) 1s2 2s2 2p6 3s1
b) 1s2 2s2 2p6 3s2
c) 1s2 2s2 2p6 3s3
d) 1s2 2s2 2p6 3s0
What is the formula for the compound calcium chloride?
a) CaCl
b) CaCl2
c) Ca2Cl
d) Ca2Cl2
Which of the following elements is a halogen?
a) Sodium (Na)
b) Chlorine (Cl)
c) Magnesium (Mg)
d) Aluminum (Al)
What is the atomic number of hydrogen?
a) 1
b) 2
c) 6
d) 8
Which of the following is an example of a physical change?
a) Rusting of iron
b) Burning of wood
c) Freezing of water
d) Digestion of food
What is the SI unit of pressure?
a) Pascal
b) Joule
c) Newton
d) Kilogram
Which of the following is the correct electron configuration for oxygen (O)?
a) 1s2 2s2 2p3
b) 1s2 2s2 2p6
c) 1s2 2s2 2p5
d) 1s2 2s2 2p4
Which of the following is a greenhouse gas?
a) Oxygen (O2)
b) Nitrogen (N2)
c) Carbon dioxide (CO2)
d) Argon (Ar)
What is the chemical formula for table salt?
a) NaCl
b) KCl
c) CaCl2
d) HCl
Which of the following is an example of an alkali metal?
a) Sodium (Na)
b) Chlorine (Cl)
c) Calcium (Ca)
d) Aluminum (Al)
Which of the following is the correct electron configuration for helium (He)?
a) 1s1
b) 1s2
c) 1s2 2s1
d) 1s2 2s2
The process of separating a mixture based on the differences in boiling points of its components is called:
a) Filtration
b) Decantation
c) Distillation
d) Sublimation
What is the chemical formula for sulfuric acid?
a) H2O
b) HCl
c) H2SO4
d) HNO3
Which of the following is an example of a non-metal?
a) Sodium (Na)
b) Chlorine (Cl)
c) Magnesium (Mg)
d) Aluminum (Al)
The process of a substance changing from a liquid to a gas is called:
a) Melting
b) Sublimation
c) Evaporation
d) Condensation
Which of the following is an example of a chemical property?
a) Density
b) Color
c) Flammability
d) Hardness
What is the chemical formula for carbon monoxide?
a) CO2
b) CO
c) C2H6
d) H2O
Which of the following is a transition metal?
a) Sodium (Na)
b) Chlorine (Cl)
c) Iron (Fe)
d) Aluminum (Al)
What is the atomic number of carbon?
a) 6
b) 8
c) 16
d) 32
Which of the following is an example of an alloy?
a) Gold
b) Silver
c) Bronze
d) Copper
What is the SI unit of energy?
a) Pascal
b) Joule
c) Newton
d) Kilogram
Which of the following is the correct electron configuration for fluorine (F)?
a) 1s2 2s2 2p3
b) 1s2 2s2 2p6
c) 1s2 2s2 2p5
d) 1s2 2s2 2p4
What is the process of a gas changing directly to a solid without going through the liquid phase called?
a) Melting
b) Sublimation
c) Evaporation
d) Condensation
Which of the following is an example of a physical property?
a) Reactivity
b) Flammability
c) Density
d) Corrosiveness
The process of separating solid particles from a liquid by passing it through a porous material is called:
a) Filtration
b) Decantation
c) Distillation
d) Sublimation
Which of the following is an example of a compound?
a) Oxygen (O2)
b) Nitrogen (N2)
c) Carbon dioxide (CO2)
d) Argon (Ar)
What is the chemical formula for hydrochloric acid?
a) H2O
b) HCl
c) H2SO4
d) HNO3
Which of the following is an example of a metalloid?
a) Sodium (Na)
b) Chlorine (Cl)
c) Silicon (Si)
d) Aluminum (Al)
What is the atomic number of nitrogen?
a) 6
b) 8
c) 16
d) 7
The process of a substance changing from a liquid to a solid is called:
a) Melting
b) Sublimation
c) Evaporation
d) Freezing
Which of the following is the correct electron configuration for chlorine (Cl)?
a) 1s2 2s2 2p3
b) 1s2 2s2 2p6
c) 1s2 2s2 2p5
d) 1s2 2s2 2p4
What is the process of converting a liquid to a gas called?
a) Melting
b) Sublimation
c) Evaporation
d) Condensation
Which of the following is an example of a chemical property?
a) Density
b) Color
c) Flammability
d) Hardness
What is the chemical formula for ammonia?
a) NH4
b) NH3
c) H2O
d) CO2
Which of the following is an example of a transition metal?
a) Sodium (Na)
b) Chlorine (Cl)
c) Iron (Fe)
d) Aluminum (Al)
What is the atomic number of oxygen?
a) 6
b) 8
c) 16
d) 32
Which of the following is an example of an alloy?
a) Gold
b) Silver
c) Bronze
d) Copper
What is the SI unit of power?
a) Pascal
b) Joule
c) Newton
d) Watt
Which of the following is the correct electron configuration for sodium (Na)?
a) 1s2 2s2 2p6 3s1
b) 1s2 2s2 2p6 3s2
c) 1s2 2s2 2p6 3s3
d) 1s2 2s2 2p6 3s0
What is the chemical formula for sodium chloride?
a) NaCl
b) KCl
c) CaCl2
d) HCl
Which of the following is a halogen?
a) Sodium (Na)
b) Chlorine (Cl)
c) Magnesium (Mg)
d) Aluminum (Al)
What is the atomic number of hydrogen?
a) 1
b) 2
c) 6
d) 8
Which of the following is an example of a physical change?
a) Rusting of iron
b) Burning of wood
c) Freezing of water
d) Digestion of food
What is the process of separating a mixture based on the differences in boiling points of its components called?
a) Filtration
b) Decantation
c) Distillation
d) Sublimation
What is the chemical formula for hydrochloric acid?
a) H2O
b) HCl
c) H2SO4
d) HNO3
Which of the following is an example of a non-metal?
a) Sodium (Na)
b) Chlorine (Cl)
c) Magnesium (Mg)
d) Aluminum (Al)
The process of a substance changing from a liquid to a gas is called:
a) Melting
b) Sublimation
c) Evaporation
d) Condensation