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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:
ENERGY: Action of electricity on materials
Does pure wood conduct electricity?
Only if it's very thick.
No, it is an insulator.
Yes, but only when wet.
Yes, very well.
The ability of a solution to conduct electricity depends on the concentration of:
Solvent molecules.
Undissolved particles.
Uncharged molecules.
Mobile ions.
The movement of electrons in a metallic conductor is best described as:
Random, with no net movement.
A 'sea' of delocalized electrons moving freely throughout the structure.
Electrons jumping between specific atoms.
Fixed vibrations in a lattice.
The negative electrode in an electrolytic cell is called the:
Pole.
Ionode.
Cathode.
Anode.
What observation would confirm that a solution is an electrolyte during an experiment?
The bulb in the circuit lights up.
The temperature of the solution decreases.
A gas is produced at the electrodes.
The solution changes color.
