Question

1. Fill in the blanks:
2 Marks
a. Substances available in nature are called
substances.
b. Rayon is also known as
2. What is meant by irreversible changes?
1 Mark​

Answer 1

Answer:

Rayon is also known as synthetic silk

.

What is meant by irreversible changes

A change is called irreversible if it cannot be changed back again. In an irreversible change, new materials are always formed. Sometimes these new materials are useful to us.

Please mark branaliset

Answer 2

Answer:

Royon is also know as ....

..........