#1
Which of the following is a chemical property of matter?
Flammability
ExplanationCharacteristic indicating the tendency of a substance to ignite or burn.
#2
What is the state of matter in which particles are tightly packed together and vibrate in place?
Solid
ExplanationState characterized by fixed volume and shape with particles closely packed and vibrating in fixed positions.
#3
Which of the following is NOT a physical property of matter?
Ability to burn
ExplanationChemical characteristic describing a substance's propensity to undergo combustion.
#4
What is the SI unit of temperature?
Kelvin
ExplanationInternational System of Units (SI) measurement unit for temperature.
#5
Which state of matter has both definite shape and volume?
Solid
ExplanationState characterized by fixed shape and volume.
#6
Which of the following is NOT a physical change?
Burning wood
ExplanationChemical process involving the transformation of wood into ash and gas, indicating a chemical change.
#7
What happens to the mass of a substance during a chemical change?
It remains the same
ExplanationPrinciple stating that mass is conserved in chemical reactions; atoms are rearranged but not created or destroyed.
#8
Which of the following is an example of a chemical change?
Rusting iron
ExplanationProcess in which iron reacts with oxygen to form iron oxide, indicating a chemical transformation.
#9
What happens to the volume of a gas when it is compressed?
It decreases
ExplanationVolume reduction caused by pressure increase on gas particles.
#10
Which of the following is a chemical change?
Wood burning
ExplanationProcess of wood reacting with oxygen to produce heat, light, and combustion products.
#11
Which of the following is an example of a heterogeneous mixture?
Granite
ExplanationMixture composed of visibly different substances not uniformly distributed throughout.
#12
What is the process of a solid changing directly into a gas called?
Sublimation
ExplanationTransition from solid to gas phase without passing through the liquid phase.
#13
Which of the following is an example of a chemical property?
Reactivity with acid
ExplanationProperty indicating the ability of a substance to undergo a chemical reaction with an acid.
#14
Which of the following is an example of a homogeneous mixture?
Air
ExplanationUniformly distributed mixture with indistinguishable components.
#15
What is the process of a gas changing directly into a solid called?
Deposition
ExplanationTransition from gas to solid phase without passing through the liquid phase.