Question

var addition of oxygen
(1 Mark Questions)
Multiple Choice Questions
1. Oxidation is a process which involves
b) addition of hydrogen
c) removal of oxygen ) d) all the above
2. The electrolysis of water gives hydrogen and oxygen in the ratio of
a) 1:1 by volume
b) 1:2 by volume
d) 4:1 by volume
c) 2:1 by volume
3. HNO3 + Ca(OH)2 →
Ca(NO3)2 + 2H20 is an example of
(i) displacement reaction
(ii) neutralization reaction
(iii) double displacement reaction (iv) combination reaction
a) (i) and (ii)
b) (i) and (iii) c) (ii) and (iii) d) (i) and (iv)
4. An element X on exposure to moist air turns reddish- brown and a new
compound Y is formed. X and Y are
al-Fe , Y-Fe2O3
b) X-Ag , Y - Ag2S
d) X-AL , Y-Al2O3
c) X-Cu, Y - Cuo
5. Fe2O3 + 3C0 → 2Fe + 3CO2
Identify the substance oxidised in the above equation
afte₂O₃ b) Fe
c) CO
d) CO2
6. Which of the following gases is used in the storage of fat and oil containing
foods for a long time.
a) carbon dioxide gas
c) oxygen gas
b) nitrogen gas
d) all the above​

Answer 1

Answer:

l am so sorry l don't know the answer

next time I will try to help you

this time please forgive me

I am so so so so sorry