Question

Q.1 MULTIPLE CHOICE
1. Burning of wood is a
(a) physical
(b) chemical
(C) natural
(d) unnatural
2.
changes are mostly reversible.
(a) Physical
(b) Chemical
(C) Emotional
(d) Technical
3. Burning of carbon in air is an example of
reaction.
(a) displacement (b) oxidation
(c) reduction (d) double displacement
4. The shallow pits where sea water is
collected for evaporation are called:
(a) ponds
(b) lakes
(c) lagoons
(d) rivers
5. Neutralisation is a:
(a) physical change (b) chemical change
(c) sometimes physical and sometimes
chemical
(d) none of these
6. Adding sodium chloride to water is a
change.
(a) physical
(b) chemical
(c) natural
(d) unnatural​

Answer 1

Answer:

1. (b) Chemical change

2. (a) Physical

3. (c) Reduction

4. (a) Ponds

5. (c) Sometimes physical and sometimes chemical

6. (a) Physical change

Answer 2

Answer:

1) IT IS A CHEMICAL CHANGE

2)PHYSICAL CHANGES

3) OXIDATION

4)PONDS

5)CHEMICAL CHANGE

6) CHEMICAL

Explanation:

1)Because when burning occurs, only chemical change takes place

2) Physical changes are mostly reversible, for ex: a) ice - water and water - ice

3) Beacuse carbon oxidizes oxyzen to form CO2

5) Because after formation of salt (after neutralisation) this prosess is irreversible and their chemical properties change

HOPE IT HELPS UH!!!