Question

Choose the correct answer:
1. A substance which oxidises another substance is
(a) A reducer (b) an oxidiser (c) a catalyst
2. Redox reaction is a chemical reaction where –
(a) Only oxidation occurs b) Only reduction occurs c) Both oxidation and reduction occur.
3. Identify the reducing agents
a) Hydrogen sulphide b) Lead oxide c) Iron
4. Oxidation is a –
(a) Physical process b) Chemical process c) Mechanical process
5. Dry ice is used –
(a) As a reducing agent b) As a refrigerant agent c) For making soda water
6. Carbon dioxide is
(a) Heavier than air b) Lighter than air c) Similar in weight as air.
7. The purest form of an amorphous allotrope of carbon is
(a) Blood charcoal b) Sugar charcoal c) Bone charcoal
8. The substance used in making pencils is
(a) Diamond b) Graphite c) Coke
9. Soda water is the solution of water with excess
(a) Carbon b) Carbon dioxide c) Oxygen gas
10. Carbo dioxide is a
(a) Unstable compound b) Stable compound c) Volatile compound​

Answer 1

Answer:

1 ) an oxidizer

2 ) both reduction and oxidation occur at same time

3) h2s ( hydrogen gain )

4) chemical process

5) as a reducing agent

6) lighter than air ( air refer to o2 )

7) anthracite or bone charcoal

8 ) graphite

9) carbon dioxide

10 ) stable compound

hope it help you

Explanation:

Answer 2

Answer:

1.b

2.c

3.b

4.b

5.b.

6.a

7.c

8.b

9.c

10.a