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ENERGY: Action of electricity on materials
ENERGY: Action of heat on materials
MATTER - PROPERTIES AND TRANSFORMATION: Chemical Reactions And Equations
MATTER - PROPERTIES AND TRANSFORMATION: Chemical Symbols, Formulae And Valency
MATTER - PROPERTIES AND TRANSFORMATION: Effect Of Heat On Substances
MATTER - PROPERTIES AND TRANSFORMATION: Introduction To Chemistry - Symbols
MATTER - PROPERTIES AND TRANSFORMATION: Mixtures And Pure Substances
MATTER - PROPERTIES AND TRANSFORMATION: Periodic table - Families of elements and Relative reactivity
MATTER - PROPERTIES AND TRANSFORMATION: Reaction With Oxygen of air
MATTER - PROPERTIES AND TRANSFORMATION: The Atom And Sub-Atomic Particles
5/50 MCQs for:
MATTER - PROPERTIES AND TRANSFORMATION: Mixtures And Pure Substances
A mixture of sugar and sand can be separated by:
Sublimation.
Simple distillation.
Dissolving the sugar in water, then filtering and evaporating.
Filtration alone.
When iodine is heated, it turns directly into a purple gas without melting. This is an example of:
Evaporation.
Melting.
Sublimation.
Condensation.
Which of the following is a pure element?
Air.
O₂.
NaCl.
H₂O.
Which of the following is a property of a pure substance, but not necessarily a mixture?
It has volume.
It can exist in different states of matter.
It has a constant chemical composition throughout.
It has mass.
To obtain pure salt from salt water, which separation technique would be most appropriate if you only care about the salt?
Filtration.
Decantation.
Simple distillation.
Evaporation.
