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The following question depicts what two techniques of crystalisation?

are fireworks chemical or physical change?

CHANGES

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Answers

1
are fireworks chemical or physical change?
Physical change.
Chemical change.
Neither.
2
The following question depicts what two techniques of crystalisation?
Fast and slow evaporation
Specific laboratory techniques.
Both in a controlled environment
They are different compounds and hence are different sizes
3
What non-ferrous metal is used in the galvanisation process?
Galvon
Silver
Copper
Zinc
4
What is the galvanisation technique?
When we produce a shine using a polishing wheel
When we protect metals coating them with other metals
We use it for finishing openings and conical surfaces
When we refine surfaces to accurate dimensions
5
Physical or chemical change? water boiling
Physical change
Chemical change
6
Galvanisation, Sacrificial Protection and Painting are all methods used to...
Prevent Corrosion
Prevent Rust
7
Physical or chemical change? iron rusting
Chemical change
Physical change
8
A chemical change
creates a new substance and you can undo the change
creates something new and you can't undo the change
doesn't create anything new, but you can undo it
doesn't create anything new, but you cannot go back
9
Using the process of Galvanisation reduces which type of chemical reaction?
Corrosion
Neutralisation
Precipitation
Metal + Acid
10
Does the following represent a chemical or physical change?
Chemical
Physical
Both
11
What does crystalisation separare?
Solids dissolved in liquids
Gases dissolved in liquids
i dunno •_•
insoluble liquids from other liquids
12
Does the following represent a chemical or physical change?
Both
Chemical
Physical
13
Physical or chemical change? melting metal
Chemical change
Physical change