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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
Why does solid sodium chloride not conduct electricity?
Its ions are not mobile.
It's a very stable compound.
It's a non-metal.
It doesn't have enough electrons.
Zinc is a metal. How does it conduct electricity?
By moving ions.
By moving free electrons.
By moving atoms.
By moving molecules.
If a substance melts but does NOT conduct electricity in its molten state, what type of bonding is most likely present?
Metallic.
Giant covalent (e.g., diamond).
Ionic.
Simple covalent (molecular).
Pure ethanol (C₂H₅OH) is generally classified as a:
Electrolyte.
Non-conductor.
Semiconductor.
Conductor.
What observation would confirm that a solution is an electrolyte during an experiment?
The temperature of the solution decreases.
A gas is produced at the electrodes.
The bulb in the circuit lights up.
The solution changes color.
