Question

give one example for each of the following changes. A. Reaction involving sound energy.
B. A photo chemical reaction involving silver salt.
C.A reaction showing formation of a black residue. D. A reaction involving blue solution.
E. A reaction showing formation of a dirty green precipitate.
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Answer 1

Answer:

When sugar is heated continuously then a black powdery substance is formed. The substance is known as Charred sugar. This is a chemical change.

Answer 2

Explanation:

A

Burning of crackers

E

Reaction of silver nitrate and potassium chloride. A precipitate of silver chloride is formed.