Question

rsed by sim
e obtained
properties
(a) Define :
ods.
iven out
ed.
nal substance
ange cannot
or light, or box
EXERCISE
1.
7. State four d
(i) a physical change
chemical ch
(ii) a chemical change
8. What do yo
(c)
Give two examples for each of the above
(a) water
two changes.
(b) a piec
2.
What are reversible and irreversible changes ?
(c) some
Give one example for each.
(d) solic
(e) an
3. Mention a change which is always
day
(a) desirable
(f) as
(b) undesirable
(g)
(c) periodic
(h)
4. Is burning a physical change or a chemical
change ? Why ?
(i)
5. A burning candle shows both physical and
chemical changes. Explain.
9. Nar
6. State three differences between evaporation and
pre
boiling
(a
physical
а!
O​

Answer 1

Answer:

I can not understand your question