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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
The technique used to separate a soluble solid from a liquid by heating the solution until the liquid turns into vapor, leaving the solid behind, is called:
Decantation.
Distillation.
Filtration.
Evaporation.
Chromatography works on the principle that components of a mixture have different:
Boiling points.
Sizes and shapes.
Melting points.
Solubilities in the mobile phase and affinities for the stationary phase.
What is the Rf value in chromatography?
Retention factor, ratio of distance moved by spot to distance moved by solvent front.
Resistance factor, how much the paper resists the solvent.
Retention force, how strongly the components stick to the paper.
Reaction frequency, how fast the components react.
Which state of matter has no definite shape or volume and fills its container completely?
Gas.
Solid.
Plasma.
Liquid.
The term 'pure substance' can refer to:
Only compounds.
Only elements.
Any homogeneous mixture.
Both elements and compounds.
