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Revise smart, understand Better

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

5/71 MCQs for:

MATTER - PROPERTIES AND TRANSFORMATION: Chemical Reactions And Equations

An unbalanced equation shows that atoms are ... and ... .

Good and bad.

None.

Created and destroyed.

Not created and destroyed.

Magnetization of iron is?

A chemical and physical change.

A physical change.

Products.

A chemical change.

A reaction in which a compound is broken down into simpler substances is called:

Combination.

Decomposition.

Displacement.

Oxidation.

The burning of a candle is an example of a:

Dissolving process.

Physical change.

Change of state only.

Chemical change.

What is the coefficient for O₂ when the following equation is balanced? H₂ + O₂ → H₂O

3.

4.

2.

1.