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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
5/80 MCQs for:
MATTER - PROPERTIES AND TRANSFORMATION: Effect Of Heat On Substances
Which state of matter is represented by the letter X?
Gas and solid.
Liquid.
Gas.
Solid.
What is observed when lead(II) nitrate is heated strongly?
It evaporates completely.
It melts into a clear liquid.
It turns black and releases a gas.
It produces a yellow solid and brown fumes.
When lead (II) nitrate is heated a solid is formed. The colour of the solid is?
White.
Blue.
Yellow.
Brown.
Why does a substance cool down during evaporation?
Chemical bonds are formed.
Faster-moving, higher-energy particles escape the surface, leaving slower, lower-energy particles behind.
Energy is absorbed from the surroundings.
The substance becomes denser.
Which part of a burning candle represents a physical change?
The wax melting.
The flame itself.
The wick burning.
The production of carbon dioxide.
