#1
What is the boiling point of water in Celsius?
100°C
ExplanationTemperature at which water changes from liquid to gas.
#2
Which state of matter has a definite volume but no definite shape?
Liquid
ExplanationMatter with fixed volume but adaptable shape.
#3
Which of the following is NOT a state of matter?
Element
ExplanationElement is a substance, not a state of matter.
#4
What is the SI unit of pressure?
Pascal
ExplanationStandard International unit for pressure measurement.
#5
Which of the following is NOT a phase transition?
Crystallization
ExplanationCrystallization is a process, not a phase transition.
#6
What is the process called when a gas changes into a liquid?
Condensation
ExplanationGas to liquid phase transition.
#7
Which law states that the pressure of a gas is inversely proportional to its volume?
Boyle's law
ExplanationPressure and volume relationship in gases.
#8
Which of the following is an example of a chemical change?
Burning wood
ExplanationWood combustion as a chemical transformation.
#9
What is the process called when a solid changes directly into a gas without passing through the liquid state?
Sublimation
ExplanationSolid to gas phase transition without liquid intermediary.
#10
Which of the following is a characteristic property of a substance?
Density
ExplanationDensity as an inherent substance property.
#11
What is the critical temperature of a substance?
The temperature at which a substance becomes supercritical
ExplanationPoint where substance transitions to supercritical state.
#12
Which law states that the total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of each gas in the mixture?
Dalton's law
ExplanationPressure law for gas mixtures.
#13
Which of the following is NOT a colligative property of a solution?
Molar mass conservation
ExplanationMolar mass conservation is not a colligative property.